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Cardiovascular System Abnormal Findings I: Inspection and Palpation01:29

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In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
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Cardiovascular System Abnormal Findings II: Auscultation01:25

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Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
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Mitral Regurgitation I: Introduction01:20

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Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
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Mitral Stenosis I: Introduction01:22

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Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Aortic Regurgitation I: Introduction01:15

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IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...
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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Related Experiment Video

Updated: May 3, 2026

Orthotopic Rat Kidney Transplantation: A Novel and Simplified Surgical Approach
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Retroaortic Left Renal Vein: A Case Report.

William A Huff1, David D Swan1, Jennifer E Geller2

  • 1Department of Anatomy, DeBusk College of Osteopathic Medicine, Lincoln Memorial University, Knoxville, USA.

Cureus
|February 28, 2025
PubMed
Summary

A retroaortic left renal vein (RLRV) is a rare anatomical variation where the vein passes behind the aorta. Increased awareness and education are vital to prevent surgical complications from this underrepresented condition.

Keywords:
anatomic variationmedical educationnephrologyretroaortic left renal veinrlrvsurgery

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Area of Science:

  • Anatomy
  • Vascular Surgery
  • Medical Education

Background:

  • The left renal vein typically courses anterior to the abdominal aorta.
  • A retroaortic left renal vein (RLRV) is an anatomical variation where it passes posterior to the aorta.
  • This anomaly is often underrepresented in medical curricula despite its clinical significance.

Observation:

  • This case report details a Type I retroaortic left renal vein (RLRV) variant.
  • The anomaly was discovered posthumously in an anatomical donor.
  • RLRV variations can lead to severe complications during retroperitoneal procedures.

Findings:

  • The prevalence of RLRV anomalies is significant but often underestimated.
  • Type I RLRV represents one of four distinct retroaortic variations.
  • Preoperative identification of RLRV is crucial for surgical planning.

Implications:

  • Enhanced medical education on RLRV anomalies can improve diagnostic accuracy.
  • Increased awareness mitigates risks of hemorrhage, renal injury, and other surgical complications.
  • Proper understanding of RLRV variants is essential for patient safety in retroperitoneal interventions.