[Inferior vena caval angiography: a new angiographic method for evaluating tricuspid regurgitation].

It is well known that right ventriculography has unavoidable disadvantages as a method for diagnosing tricuspid regurgitation. In this study, inferior vena caval angiography (IVC angiography) was tested as a new method for quantitatively diagnosing tricuspid regurgitation. With this method, no catheter passes through the tricuspid valve, and only a small amount (10 ml) of contrast material injected into the upper portion of the inferior vena cava visualizes the entire right atrium, and tricuspid regurgitation is manifested by turbulence or a negative jet in the right atrium. With respect to the degree, tricuspid regurgitation was graded as absent (0), mild (1+), moderate (2+) and severe (3+) using the criteria shown in Fig. 1. Mild tricuspid regurgitation was diagnosed when systolic turbulence was observed in the right atrium and did not reach the right atrial wall. Moderate tricuspid regurgitation was diagnosed when systolic turbulence reached the right atrial wall. Severe tricuspid regurgitation was diagnosed when systolic turbulence entered the inferior vena cava. Sixty-four patients with valvular heart disease and four having coronary heart disease were studied using IVC angiography and pulsed Doppler echocardiography. Using Doppler, the severity of tricuspid regurgitation was determined according to the distribution of the regurgitant signal in the right atrium. The degree of tricuspid regurgitation by IVC angiography correlated well with that by Doppler. All patients with severe (3+) regurgitation and 15 of 22 patients with moderate (2+) regurgitation required surgery, but all with no (0) regurgitation and 12 of 14 with only mild (1+) regurgitation required no surgical correction of the tricuspid valve.(ABSTRACT TRUNCATED AT 250 WORDS)