Cardiology Referral Guidelines for Valvular Heart Disease

Primary Indications for Cardiology Referral

The American Heart Association and American College of Cardiology classify patients with mild-to-moderate mitral regurgitation as having Stage B progressive valvular disease, requiring cardiology follow-up every 6-12 months with annual echocardiography 3, 2
Moderate mitral regurgitation requires clinical evaluation every 6-12 months with annual echocardiography to monitor for progression to severe disease or development of left ventricular dysfunction 2
The American College of Cardiology recommends that patients with aortic valve sclerosis be monitored for progression to hemodynamically significant stenosis, with echocardiographic follow-up every 1-2 years 3, 4

The American Heart Association recommends that patients with valvular heart disease and hypertension be treated with ACE inhibitors or dihydropyridine calcium channel blockers to reduce afterload without slowing heart rate 1, 2
Beta-blockers should be avoided in patients with aortic regurgitation, as they can worsen regurgitation by prolonging diastolic filling time 1

The American College of Cardiology recommends annual echocardiography for patients with moderate mitral regurgitation to assess for progression to severe disease or development of left ventricular dysfunction 2
Echocardiographic follow-up every 1-2 years is recommended for patients with aortic valve sclerosis to monitor for progression to hemodynamically significant stenosis 1, 2
Serial imaging every 1-2 years is required to monitor the dimensions of the ascending aorta and detect progression toward surgical thresholds 1, 5

The American College of Cardiology recommends surgery for patients with mitral regurgitation if symptoms develop, left ventricular ejection fraction falls to <60%, or left ventricular end-systolic diameter reaches ≥40 mm 2
Surgery is indicated for patients with aortic valve disease if symptoms develop, left ventricular ejection fraction falls to <55%, left ventricular end-systolic diameter exceeds 50 mm, or progression to severe stenosis occurs 3, 1
The American College of Cardiology recommends surgery for patients with an ascending aortic diameter of ≥5.0 cm (or ≥4.5 cm with bicuspid valve or rapid progression ≥0.5 cm/year) 5, 1