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Imaging findings of hepatocellular carcinoma with portal vein tumor Ultrasound Evaluation of the Portal and Hepatic Veins Of those, point-of-care ultrasound (POCUS) of the inferior vena cava (IVC) has gained popularity as a noninvasive, easily obtainable, and rapid means of intravascular volume assessment.
Focused ultrasound of the caudal vena cava in dogs with cavitary - PLOS On the bottom end of the liver are the organ's unusual double blood supplies. 1. IVC respiratory collapsibility index was determined as well. It is located at the posterior abdominal wall on the right side of the aorta. Although the liver has a dual blood supply, the hepatic veins provide the sole route of egress for blood exiting the liver. Heart Disease and Saturated Fat: Do the Dietary Guidelines Have It All Wrong?
Dilated abdominal veins due to a congenital inferior vena caval web Elevated pulmonary arterial pressure in cor pulmonale causes dilatation of the IVC.
IVC - Heart Disease - MedHelp A Doppler echocardiographic study from the right parasternal approach. Macroscopically CT and MRI are able to depict cirrhotic changes as non-specific findings. Superior vena cava syndrome is caused by the partial blockage of the superior vena cava, which is the vein that carries blood from the head, neck, chest, and arms to the heart. It is usually <2cm in diameter. Terms of Use. Gore RM, Mathieu DG, White EM et-al. PMC 1994;162 (1): 71-5. The liver has a unique, dual blood supply in which 25% of the flow comes from the hepatic artery and 75% through the portal vein ( Fig. Venous Excess Doppler Ultrasound for the Nephrologist: Pearls and Pitfalls.
What is dilated portal vein? - Studybuff Fish oil, folic acid, vitamin C. Find out if these supplements are heart-healthy or overhyped. On the bottom end of the liver are the organs unusual double blood supplies. Korean J Intern Med. Treatment read more due to a hypercoagulable state, a vessel wall lesion (eg, pylephlebitis, omphalitis), an adjacent lesion (eg, pancreatitis Overview of Pancreatitis Pancreatitis is classified as either acute or chronic. Other possible causes of liver disease that would lead to portal hypertension include: hemochromatosis alpha 1-antitrypsin deficiency hepatitis B chronic hepatitis C alcohol-related liver.
Clinical Outcomes of Transjugular Intrahepatic Portosystemic Shunt This results in a micronodular cirrhosis, which is indistinguishable from cirrhosis produced by other causes 2. Case 1: congestive hepatopathy and ascites, View Bruno Di Muzio's current disclosures, View Yuranga Weerakkody's current disclosures, see full revision history and disclosures, World Health Organization 2001 classification of hepatic hydatid cysts, recurrent pyogenic (Oriental) cholangitis, combined hepatocellular and cholangiocarcinoma, inflammatory myofibroblastic tumor (inflammatory pseudotumor), portal vein thrombosis (acute and chronic), cavernous transformation of the portal vein, congenital extrahepatic portosystemic shunt classification, congenital intrahepatic portosystemic shunt classification, transjugular intrahepatic portosystemic shunt (TIPS), transient hepatic attenuation differences (THAD), transient hepatic intensity differences (THID), total anomalous pulmonary venous return (TAPVR), hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu disease), cystic pancreatic mass differential diagnosis, pancreatic perivascular epithelioid cell tumor (PEComa), pancreatic mature cystic teratoma (dermoid), revised Atlanta classification of acute pancreatitis, acute peripancreatic fluid collection (APFC), hypertriglyceridemia-induced pancreatitis, pancreatitis associated with cystic fibrosis, low phospholipid-associated cholelithiasis syndrome, diffuse gallbladder wall thickening (differential), focal gallbladder wall thickening (differential), ceftriaxone-associated gallbladder pseudolithiasis, biliary intraepithelial neoplasia (BilIN), intraductal papillary neoplasm of the bile duct (IPNB), intraductal tubulopapillary neoplasm (ITPN) of the bile duct, multiple biliary hamartomas (von Meyenburg complexes), dilated IVC/hepatic veins, hepatomegaly, ascites, mean diameter: 8.8 mm (in passive congestion), spectral velocity pattern (lVC & hepatic veins), flattening of Doppler waveform in hepatic veins, to-and-fro motion in hepatic veins and IVC, increased pulsatility of the portal venous Doppler signal, early enhancement of dilated IVC and hepatic veins due to contrast reflux from the right atrium into IVC, heterogeneous, mottled and reticulated mosaic parenchymal pattern with areas of poor enhancement, peripheral large patchy areas of poor/delayed enhancement, periportal low attenuation (perivascular lymphedema). We do not control or have responsibility for the content of any third-party site. What is prominent IVC and hepatic veins?
Inferior vena cava syndrome - Wikipedia Is it OK to get pregnant when my IVC is dilated?
Wilson's Disease | MedlinePlus nance imaging showed normal hepatic vein and inferior vena cava without obstruction, but dilated PV. The link you have selected will take you to a third-party website.
2023 ICD-10-CM Diagnosis Code I87.8: Other specified disorders of veins 2005 - 2023 WebMD LLC. IVC plethora indicates high right atrial pressure and an overfilled and less compliant venous system. (2009) ISBN:0323053750. Check for errors and try again. Bottom Line. (2009) ISBN:0323053750. MeSH terms Adolescent, https://www.youtube.com/watch?v=Q6VlG3kv28Y. Manifestations of focal venous obstruction depend on the location. Inferior vena cava syndrome ( IVCS) is a very rare constellation of symptoms resulting from either an obstruction, or stenosis of the inferior vena cava. Budd-Chiari syndrome. Excerpt Obstruction to the blood flow through the hepatic veins leads to a pathological-clinical entity known as Chiari's syndrome, of which there have . Autor de la entrada: Publicacin de la entrada: junio 16, 2022 Categora de la entrada: st luke's hospital nyc visiting hours Comentarios de la entrada: the doubt of future foes sparknotes the doubt of future foes sparknotes {"url":"/signup-modal-props.json?lang=us"}, Di Muzio B, Weerakkody Y, Rock P, et al. Saunders. It divides your livers right lobe from front to back.
causes of dilated ivc and hepatic veins - eztransport123.com The most common cause of portal hypertension is cirrhosis (scarring) of the liver. It can be caused by physical invasion or compression by a pathological process or by thrombosis within the vein itself. Inferior vena cava syndrome (IVCS) is a constellation of symptoms resulting from obstruction of the inferior vena cava.
All about portal vein: a pictorial display to anatomy, variants and Without treatment, it can lead to liver failure, cirrhosis (scarring in the liver), or other serious problems. IVC diameter was determined in the subxiphoid approach 10 to 20 mm away from its junction to the right atrium. Her vital signs included blood pressure of 107/64 mmHg, pulse of 60 beats per minute, respiration of 20 breaths per minute, and body temperature of 36.5. Fifty-eight top-level athletes and 30 healthy members of a matched control group underwent a complete Doppler echocardiographic study.
Portal Hypertension Causes, Symptoms, Treatments, Tests - WebMD causes of dilated ivc and hepatic veins. Addi-tionally, gastroscopy showed esophageal vein exposure and portal hypertensive gastropathy. Epub 2013 Mar 9. Consequences read more. An enlarged right atrium can be caused by a birth defect, an anatomical problem in the heart, or chronic health problems like high blood pressure. World J Gastrointest Endosc. They can be congenital or acquired and occur within or outside the liver.
Passive hepatic congestion | Radiology Reference Article - Radiopaedia But how IVC looks like depends on how the patientis breathing, spontaneouslyvs mechanically ventilated. Learn more about the Merck Manuals and our commitment to Global Medical Knowledge. There are several very important reasons to assess the IVC with echocardiography. 8600 Rockville Pike We report the first case series of IVCT observed in Taiwan with a brief literature review. Anatomically, theyre often used as landmarks indicating portions of the liver, though there can be a great deal of variation in their structure.. hepatic veins and suprahepatic IVC:early enhancement due to reflux from the atrium, portal vein:diminished, delayed or absent enhancement. Is a low-fat diet really that heart healthy after all? Notably, this is often a feature of liver cirrhosis. The cause is often a blood clot or growth. Indian J Crit Care Med.
Budd-Chiari Syndrome Imaging - Medscape Inferior Vena Caval Thrombosis Clinical Presentation - Medscape I love to write and share science related Stuff Here on my Website.
What Is a Hepatic Vein and What Does It Do? - WebMD It is necessary to have the patient perform a sniff during the evaluation of the IVC.
Membranous IVC Obstruction Presenting with Antegrade/Retrograde Im thinking about having a baby in near future. Cirrhosis Cirrhosis Cirrhosis is a late stage of hepatic fibrosis that has resulted in widespread distortion of normal hepatic architecture. The Fluency . Elevated hepatic venous pressure and a decrease in hepatic venous flow cause hypoxia in hepatic parenchyma, and eventual diffuse hepatocyte death and fibrosis. It can help doctors diagnose a range of heart problems. Unlike other organs, 75% of the liver blood supply is nutrient dense venous blood, entering into the liver from the portal vein while the remaining oxygenated blood supply enters from the hepatic artery as arterial blood. Changing the subject to share a new Medical issue. Causes of splenomegaly are myriad, as are the read more .
Imaging Findings of Congestive Hepatopathy | RadioGraphics In turn, this can lead to varicose veins in that part of the bodyswollen and misshapen large veins at the bodys surfaceand, this condition is among those that lead to liver cirrhosis. Would you like email updates of new search results? The liver has a dual blood supply. What is normal IVC size? Normally the right hepatic vein measures <6 mm and, in these patients, its mean is ~9 mm ref needed. What do the C cells of the thyroid secrete? Cirrhosis is the most common cause of diffuse intrahepatic venous outflow obstruction. Inferior Vena Cava may appear congested when its dilated without any respiratory variation collapsed with very small diameter through the respiratory cycle, or compliant and vary through respiratory cycle. Normal pulmonary artery pressure is 8-20 mm Hg at rest. The right hepatic vein is the largest.
What does it mean to have a dilated IVC? - KnowledgeBurrow.com What causes enlargement of the hearts right atrium?
Noncirrhotic portal hypertension misdiagnosed as liver cirrhosis: A Use for phrases ADVERTISEMENT: Supporters see fewer/no ads. The 2008 ACEP Policy Statement on Emergency Ultrasound Guidelines includes the evaluation of intravascular volume status and estimation of central venous pressure (CVP) based on sonographic examination of the inferior vena cava (IVC). 7). IVC variants and dilated collateral veins can be mistaken for malignancy. Doctors divide the liver into eight sections to map it for surgeries and tests. Having DVT also increases the likelihood of a blood clot breaking off and traveling to the heart, lungs, or brain. In adults, an IVC collapsibility index of greater than 50% is associated with reduced right atrial pressure and severe dehydration, and indicates that the patient needs fluid therapy(23). The diameter of the inferior vena cava (IVC) and degree of inspiratory collapse are used as indices in the echocardiographic estimation of right atrial (RA) pressure. It can be caused by physical invasion or compression by a pathological process or by thrombosis within the vein itself. Manifestations of focal venous obstruction depend on the location. These include:. Non-Invasive Estimation of Right Atrial Pressure Using a Semi-Automated Echocardiographic Tool for Inferior Vena Cava Edge-Tracking. An IVC diameter greater than 20 mm is commonly regarded as an upper limit of normal, which is a noninvasive indication of increased RA pressure in patients with cardiac or renal disease [4]. When portal vein blood flow increases, hepatic artery flow decreases and vice versa (the hepatic arterial buffer response). Please confirm that you are a health care professional. The IVC diameter is altered with volume status and respiration, with higher IVC diameter during expiration than inspiration. Overview. We offer this Site AS IS and without any warranties. causes of dilated ivc and hepatic veinswhat is naimisharanya kshetrawhat is naimisharanya kshetra The portal vein (which is rich in nutrients and relatively high in oxygen) provides two thirds of blood flow to the liver. The IVC was normal (
/=2.6 cm) in 24.1% of athletes. Recognition of CH at imaging is critical because advanced liver fibrosis . Thrombosis of the inferior vena cava (IVC) is an under-recognized entity that is associated with significant short- and long-term morbidity and mortality. Hacking C, Bashir O. Hepatic veins. Inferior vena cava thrombosis (IVCT) is rare and can be under-recognized. Artery or Vein? A Classic Example of a Pulsatile Inferior Vena Cava in The hepatic artery (which is oxygen-rich) supplies the rest. Doctors have observed early bifurcation (splitting into two) or trifurcation (splitting into three) of this veinwith some people even having two of themas these drain into the IVC. Zakim D, Boyer TD. Variations to the anatomy of the hepatic veins are not uncommon and occur in approximately 30% of the population. Mesin L, Policastro P, Albani S, Petersen C, Sciarrone P, Taddei C, Giannoni A. J Clin Med. Prolonged exposure to elevated hepatic venous pressure may lead to liver fibrosis and cirrhosis. Treatment is with drugs to remove the extra copper from your . IVC, inferior vena cava. One is the hepatic artery, which brings in oxygen-rich blood from the heart. Budd-Chiari syndrome is diagnosed through a physical examination and with certain tests. The most common cause is portal hypertension. On the bottom end of the liver are the organs unusual double blood supplies. Worldwide, the most common cause of PHT is believed to be schistosomiasis. Nevertheless, it is proved that provoking factors can be: high blood coagulability; altered biochemical composition of blood; infectious venous diseases; hereditary factor. Epub 2014 Feb 27. o [ pediatric abdominal pain ] 2013 Dec;99(23):1727-33. doi: 10.1136/heartjnl-2012-303465. It is named after the cut appearance of the nutmeg seed. Other things that can block the hepatic veins. If this happens, patients could have a heart attack, pulmonary embolism, or stroke. The 2023 edition of ICD-10-CM I87.8 became effective on October 1, 2022. Symptoms in pregnant women This occurs when the smaller vein transporting blood to the heart from the lower body gets compressed by the growing uterus. Which is worse a dilated IVC or a collapsed IVC? extending the distal portion of the bare stent into the portal vein for 1-2 cm or the proximal portion into the hepatic vein/ inferior vena cava (IVC) junction. The three main hepatic veins link up at the top of your liver at the inferior vena cava, a large vein that drains the liver to your right heart chamber. Verywell Health's content is for informational and educational purposes only. What does dilated IVC with respiratory collapse mean? Early in the course of the disease, the main abnormality is enlargement of the right hepatic lobe. "Hepatic" means relating to the liver. At the time the article was last revised Yuranga Weerakkody had no recorded disclosures. Although the liver has a dual blood supply, the hepatic veins provide the sole route of egress for blood exiting the liver. This condition is characterised by bacterial thrombophlebitis in the hepatic venous opening of IVC which on resolution could form a membrane or a stenosis or a thick obstruction followed by collaterals. Normal IVC diameter was measured both during inspiration and expiration by M-mode echocardiography in subcostal view. Dilated inferior vena cava: a common echocardiographic finding in A rare consequence of inferior vena cava thrombosis is cauda equina syndrome. Results: The IVC diameter varied from 0.46 to 2.26cm in the study individuals. In severe cases, you may need a liver transplant. A dilated IVC (>1.7 cm) with normal inspiratory collapse (>50%) is suggestive of a mildly elevated RA pressure (610 mm Hg). 2021 Aug 20;8:719113. doi: 10.3389/fcvm.2021.719113. They deliver deoxygenated blood from the liver and other lower digestive organs like the colon, small intestine, stomach, and pancreas, back to the heart; this is done via the IVC. Since the liver serves the important function of filtering blood as it moves from the digestive tract, these veins are particularly important for overall health. Caput Medusae: Symptoms, Causes, Diagnosis, and Treatment - Healthline 1992 Jul;86(1):214-25. doi: 10.1161/01.cir.86.1.214. Sometimes one or more hepatic veins can narrow or get blocked, so blood cant flow back to your heart. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. Dialysis a treatment that filters your blood through a machine. . Plethora of inferior vena cava (IVC) - Dr. Johnson Francis, DM (HBV) infection was the predominant cause of liver cirrhosis in both groups (p = 0.010). Patho Final - NUR 0020 Pathophysiology Term - Fall 2022 (2231) Key causes of dilated ivc and hepatic veins. Passive hepatic congestion: cross-sectional imaging features. Specific vascular lesions may occur in the hepatic artery, hepatic vein, or portal vein. Privacy Policy Torabi M, Hosseinzadeh K, Federle MP. Overview of Blood Vessel Disorders of the Liver Other causes of portal hypertension include blood clots in the portal vein, blockages of the veins that carry the blood from the liver to the heart, a parasitic infection called. What causes enlarged inferior vena cava? government site. Passive hepatic congestion is a well-studied result of acute or chronic right-sided heart failure. Obstruction can occur in the intrahepatic or extrahepatic veins (Budd-Chiari syndrome Budd-Chiari Syndrome Budd-Chiari syndrome is obstruction of hepatic venous outflow that originates anywhere from the small hepatic veins inside the liver to the inferior vena cava and right atrium. Isolated dilatation of the inferior vena cava - KJIM causes of dilated ivc and hepatic veins - palacepawnbrokers.com Manifestations read more ) or in the intrahepatic terminal hepatic venules and hepatic sinusoids (sinusoidal obstruction syndrome Sinusoidal Obstruction Syndrome Hepatic sinusoidal obstruction syndrome is caused by endothelial injury, leading to nonthrombotic occlusion of the terminal hepatic venules and hepatic sinusoids, rather than of the hepatic read more , previously called veno-occlusive disease) but often occurs in both. Consequences read more , reduced portal blood flow, ascites Ascites Ascites is free fluid in the peritoneal cavity. Despite its dual blood supply, the liver, a metabolically active organ, can be injured by. The IVC might be dilated in various euvolemic conditions, including pulmonary hypertension and valvulopathies, and it might also be dilated as normal physiologic variance in trained athletes. Measurements taken at the junction of the right atrium and IVC are not equivalent to the other sites; clinicians should avoid measuring percentage collapse of . Venous: Etiology and manifestations for varicose veins, deep vein thrombosis. Ch 8: The Vascular System Flashcards | Quizlet Bethesda, MD 20894, Web Policies Other symptoms include fatigue, abdominal pain, jaundice (a yellowing of the skin), nausea, and bleeding in the esophagus of the throat.. This may be of particular utility in cases of undifferentiated hypotension or other scenarios of abnormal volume states, such as sepsis, dehydration, hemorrhage, or heart failure. 7 Which is worse a dilated IVC or a collapsed IVC? Your blood supplies oxygen and nutrients to all the tissues of your body. These veins vary in size between 6 and 15 millimeters (mm) in diameter, and theyre named after the corresponding part of the liver that they cover. Causes that may result in a pulsatile portal venous flow include tricuspid regurgitation, aortic-right atrial fistula, or a fistula between portal and hepatic veins. Typical structural features of the athlete's heart as defined by echocardiography have been extensively described; however, information concerning extracardiac structures such as the inferior vena cava (IVC) is scarce. In most cases, the right hepatic vein will be whats affected. Interrupted IVC results from failure of fusion of the component parts of the embryological IVC and may occur at any level. This increases venous blood volume and CVP. University of Rochester Medical Center: The Liver: Anatomy and Functions., Med-ed.virginia.edu: Introduction to Gastrointestinal Radiology., Clinical Liver Disease: Normal Liver Anatomy., Radiopedia.org: Hepatic Veins: Couinard classification of hepatic segments, Hepatic veins., The British Journal of Radiology: Hepatic Vein Variations in 500 Patients: Surgical and Radiological Significance., National Cancer Institute: NCI Dictionary of Cancer Terms: Vena Cava., National Organization for Rare Disorders (NORD): Budd-Chiari Syndrome., UptoDate: Budd-Chiari syndrome: Epidemiology, clinical manifestations, and diagnosis., Mount Sinai: Hepatic vein obstruction (Budd-Chiari)., Merck Manual Professional Version: Overview of Vascular Disorders of the Liver.. The most common presenting symptoms of SVC syndrome are face/neck swelling, distended neck veins, cough, dyspnea, orthopnea, upper extremity swelling, distended chest vein collaterals, and conjunctival suffusion. Suppurative thrombophlebitis of the IVC is even a more uncommon subtype of IVC thrombosis and is mostly associated with IVC filters or venous catheters. You might have severe pain right away or no symptoms until the disease gets worse. June 9, 2022 Posted by is bristol, ct a good place to live; Passive hepatic congestion: cross-sectional imaging features. At the time the article was created Bruno Di Muzio had no recorded disclosures. By clicking Accept All Cookies, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Budd-Chiari syndrome is a rare disorder characterized by narrowing and obstruction (occlusion) of the veins of the liver (hepatic veins). Smart Grocery Shopping When You Have Diabetes, Surprising Things You Didn't Know About Dogs and Cats, Smoking Pot Every Day Linked to Heart Risks, Artificial Sweetener Linked to Heart Risks, FDA Authorizes First At-Home Test for COVID and Flu, New Book: Take Control of Your Heart Disease Risk, MINOCA: The Heart Attack You Didnt See Coming, Health News and Information, Delivered to Your Inbox. Diagnosis is based on ultrasonography. Where can you customize keyboard shortcuts in FCPX? 1. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Cause: prolonged standing. The three main hepatic veins link up at the top of your liver at the inferior vena cava, a large vein that drains the liver to your right heart chamber. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. This. 7) [13]. I am currently continuing at SunAgri as an R&D engineer. Nearly all portal vein disorders obstruct portal vein blood flow and cause portal hypertension Portal Hypertension Portal hypertension is elevated pressure in the portal vein. Diffuse obstruction results in congestion of the sinusoids, hepatomegaly, portal hypertension , reduced portal blood flow, ascites , and splenomegaly . Portal hypertension is divided into intrahepatic, extrahepatic, and hyperdynamic categories. (See also Overview of the Spleen.) Radiologically, it is most appreciable on portovenous phase imaging on cross-sectional imaging. The portal vein is a major vein that leads to the liver. Inferior vena cava (IVC) is normally 1.5 to 2.5 cm in diameter (measured 3 cm from right atrium) At the time the article was created Bruno Di Muzio had no recorded disclosures. Doctors use echocardiograms to help them diagnose heart problems, such as damaged cardiac tissue, chamber enlargement, stiffening of the heart muscle, blood clots in the heart, fluid around the heart, and damaged or poorly functioning heart valves. Multiple regression analysis showed the impact of VO(2) max, cardiac index, and right ventricular and left ventricular end-diastolic dimensions on IVC diameter. Is there confession in the Armenian Church? Our website is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Most common causes of passive hepatic congestion 4: Early in the course of the disease, the main abnormality is enlargement of the right hepatic lobe. 3. Check for errors and try again. Passive hepatic congestion, also known as congested liver in cardiac disease, describes the stasis of blood in the hepatic parenchyma, due to impaired hepatic venousdrainage, which leads to the dilation of central hepatic veins and hepatomegaly. The right atrial cavity area is 21.0cm during systole The inferior vena cava appears dilated measuring 2.20cm.The vessel collapses with inspiration.The tricuspid valve is normal.There is trivial tricuspid regurgigation.Regurgitant velocity is 311.0cm/s and estimated RV systolic pressure is 43mmHg consistent with mild pulmonary hypertension." Enter a Melbet promo code and get a generous bonus, An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. The left hepatic vein divides the left lobe from left to right. Ultrasound Assessment of the Hepatic Vasculature All forms of heart disease (congenital or acquired) are linked to passive hepatic congestion. and People with Deep Vein Thrombosis (DVT), or those who have blood clots in a deep leg vein, are at risk for IVC blockage. Measures reflect the median values between maximal inspiratory and expiratory values. All forms of heart disease (congenital or acquired) are linked to passive hepatic congestion. June 30, 2022; homes for sale in florence, al with acreage; licking county jail mugshots . What are the pros and cons of taking fish oil for heart health? How is Budd-Chiari syndrome diagnosed? More dilated hepatic veins often present a "deer-horn" appearance. Interrupted inferior vena cava: high-risk anatomy for right thoracotomy Additionally, gastroscopy showed esophageal . Any dilatation may indicate obstr. Clots of the hepatic veins lead to a rare disorder called Budd-Chiari syndrome. o [teenager OR adolescent ], , MD, University of Colorado School of Medicine. The inferior vena cava (IVC)is a large venous structure which delivers blood into the right atrium of the heart.