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.
Mitral regurgitation can be acute or chronic, each presenting differently and requiring different approaches:
1. Acute Mitral Regurgitation:
2. Chronic Mitral Regurgitation:
1. Physical Examination:
A stethoscope can detect characteristic heart murmurs. A typical holosystolic murmur at the apex radiates to the left axilla. In chronic cases, observe for signs of heart failure, such as peripheral edema and ascites.
2. Diagnostic Imaging and Tests:
Mitral regurgitation, or MR, symptoms range from acute to chronic.
Acute MR presents symptoms like dyspnea, hypotension, tachycardia, thready peripheral pulses, cool, clammy extremities, and cardiogenic shock.
Chronic MR may remain asymptomatic for years.
As the disease advances, early manifestations of left ventricular failure may include weakness, fatigue, palpitations, and dyspnea.
These gradually progress to orthopnea, paroxysmal nocturnal dyspnea, and peripheral edema.
Assessment of MR begins with a comprehensive patient history collection and a physical examination focusing on cardiac auscultation.
The presence of a systolic murmur, described as a blowing sound best heard at the apex of the heart and often radiating to the left axilla, suggests MR.
Diagnostic tests include echocardiography, which assesses regurgitation severity, valve anatomy, and ventricular function.
A cardiac MRI reveals detailed images of the mitral valve and surrounding structures, while an electrocardiogram can reveal atrial fibrillation.
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