Related Experiment Video

Updated: Jun 7, 2026

Surgically Induced Cardiac Volume Overload by Aortic Regurgitation in Mouse
08:12

Surgically Induced Cardiac Volume Overload by Aortic Regurgitation in Mouse

Published on: August 30, 2022

Valvular regurgitation impact on left ventricular 2-dimensional and Doppler echocardiographic indices in patients

Olufemi E Ajayi1, T Collete Abiona, Michael O Balogun

  • 1Division of Cardiology, Department of Medicine, Obafemi Awolowo University, Ile-Ife, Nigeria.

Journal of the National Medical Association
|November 9, 2010
PubMed

Insights

Valvular regurgitation is common in hypertensive Nigerians and accelerates cardiac damage. Even mild regurgitation can worsen heart disease in Black individuals with hypertension.

Area of Science:

  • Cardiology
  • Hypertension Research
  • Valvular Heart Disease

Background:

  • Black populations exhibit higher hypertension prevalence and faster cardiac damage.
  • Valvular heart disease is more prevalent and occurs earlier in Black individuals compared to White individuals.

Purpose of the Study:

  • To investigate the contribution of valvular regurgitation to the severity of hypertensive heart disease in Nigerian patients.
  • To compare echocardiographic indices in hypertensive Nigerians with and without valvular regurgitations.

Main Methods:

  • Echocardiographic indices were evaluated in 75 essential hypertensive Nigerians (48 with, 27 without valvular regurgitations).
  • Demographic and echocardiographic data, including valvular lesion types and severity, were compared between groups.
  • Bivariate logistic regression and analysis of variance were used for comparisons.

Main Results:

  • Individuals with valvular regurgitation showed significantly larger cardiac size, greater mass, higher volume, and increased left atrial size compared to those without.
  • Atrial size, cardiac volume, and dimension were independent predictors of regurgitation.
  • Aortic regurgitation and mitral regurgitation were the most common valvular lesions, with aortic orifice dimension increasing with hypertension duration.

Conclusions:

  • Regurgitant lesions are frequent and appear early in hypertensive individuals of African descent.
  • Mild valvular regurgitation may exacerbate preclinical concentric hypertrophy in Black patients with hypertension.
Abstract

More Related Videos

Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension07:38

Comprehensive Echocardiographic Assessment of Right Ventricle Function in a Rat Model of Pulmonary Arterial Hypertension

Published on: January 20, 2023

Related Concept Videos

Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

Aortic Regurgitation II: Clinical Features and Diagnostic Tests

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...
Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

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...
Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

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...
Mitral Regurgitation II: Clinical Features and Diagnostic Tests01:23

Mitral Regurgitation II: Clinical Features and Diagnostic Tests

Mitral regurgitation (MR) is a valvular heart disorder in which the mitral valve fails to close tightly, allowing blood to leak backward into the heart. Understanding the clinical manifestations, assessment, diagnostic findings, and medical management of MR is crucial to effectively managing affected patients.Clinical Manifestations of Mitral RegurgitationMitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:1. Acute Mitral...
Aortic Regurgitation III: Medical Management01:25

Aortic Regurgitation III: Medical Management

Aortic regurgitation (AR) is when the aortic valve does not close or seal properly, leading to backward blood circulation from the aorta into the left ventricle during diastole. Common causes of AR include rheumatic heart disease, congenital valve defects, and aortic root dilation. Managing AR requires a multifaceted approach to alleviate symptoms, preserve left ventricular function, and address the underlying cause of the regurgitation. Patients with symptomatic AR or significant left...
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...