Tricuspid regurgitation
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| Tricuspid regurgitation Classification and external resources | |
| ICD-10 | I07.1, I36.1 |
|---|---|
| ICD-9 | 397.0 |
| DiseasesDB | 13348 |
| eMedicine | med/2314 |
| MeSH | D014262 |
| Cardiology Network |
 Discuss Tricuspid regurgitation further in the WikiDoc Cardiology Network |
| Adult Congenital |
|---|
| Biomarkers |
| Cardiac Rehabilitation |
| Congestive Heart Failure |
| CT Angiography |
| Echocardiography |
| Electrophysiology |
| Cardiology General |
| Genetics |
| Health Economics |
| Hypertension |
| Interventional Cardiology |
| MRI |
| Nuclear Cardiology |
| Peripheral Arterial Disease |
| Prevention |
| Public Policy |
| Pulmonary Embolism |
| Stable Angina |
| Valvular Heart Disease |
| Vascular Medicine |
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Tricuspid insufficiency, a valvular heart disease also called Tricuspid regurgitation, refers to the failure of the heart's tricuspid valve to close properly during systole. As a result, with each heart beat, a portion of the blood is pumped out from the right side of the heart backwards in the opposite direction into the right atrium rather than forwards into the right ventricle.
Causes
Although congenital causes of tricuspid insufficiency exist, most cases are due to dilation of the right ventricle. Such dilation leads to derangement of the normal anatomy and mechanics of the tricuspid valve and the muscles governing its proper function. The result is incompetence of the tricuspid valve. Common causes of right ventricular dilation include left heart failure, pulmonary hypertension, and right ventricular infarction. One notable exception to right ventricular dilation as a cause of tricuspid insufficiency occurs in right-sided endocarditis (i.e. infection affecting the right side of the heart). In that case, there is direct damage to the tricuspid valve as as a result of infection.
Diagnosis
Symptoms
Tricuspid insufficiency may be asymptomatic, especially if right ventricular function is well preserved. Conversely, edema, vague upper abdominal discomfort (from a congested liver), and fatigue (due to diminished cardiac output) can all be present to some degree.
Physical examination
On examination, the jugular venous pressure is usually elevated, and 'CV' waves can be seen. The liver may be enlarged and is often pulsatile (the latter finding being virtually diagnostic of tricuspid insufficiency). Peripheral edema is often found. In severe cases, there may be ascites and even cirrhosis (so-called 'cardiac cirrhosis).
Tricuspid insufficiency may lead to the presence of a pansystolic heart murmur. Such a murmur is usually of low frequency and best heard low on the left sternal border. It tends to increase with inspiration. However, the murmur may be inaudible reflecting the relatively low pressures in the right side of the heart. A third heart sound may also be present.
Echocardiography
The diagnosis is usually confirmed on echocardiography if a pulsatile liver and/or the presence of prominent CV waves in the jugular pulse is noted on physical examination.
Therapy
In most cases, surgery is not indicated since the root problem lies with a dilated or damaged right ventricle. Medical therapy with diuretics is the mainstay of treatment. Unfortunately, this can lead to volume depletion and decreased cardiac output. Indeed, one must often accept a certain degree of symptomatic tricuspid insufficiency in order to prevent a decrease in cardiac output. Treatment with medicines to reduce cardiac afterload may also be of benefit but a similar risk of depressed cardiac output applies.
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
