[Evaluation of hepatic venous flow patterns using a pulsed Doppler technique].

Area of Science:

• Cardiology
• Medical Imaging
• Hemodynamics

Background:

• Hepatic venous flow patterns reflect cardiac function.
• Assessing cardiac function in various cardiac conditions is crucial.
• Pulsed Doppler echocardiography offers a non-invasive method for hemodynamic assessment.

Purpose of the Study:

• To evaluate hepatic venous flow patterns using pulsed Doppler echocardiography.
• To correlate these patterns with cardiac function in patients with diverse cardiac conditions.
• To assess the impact of afterload stress on hepatic venous flow.

Main Methods:

• Pulsed Doppler echocardiography was used to analyze hepatic venous flow in 80 patients and 11 controls.
• Patients included those with dilated cardiomyopathy, myocardial infarction, and atrial fibrillation.
• Afterload stress was induced by angiotensin II infusion in 51 subjects.

Main Results:

• Hepatic venous flow patterns, including systolic/diastolic velocity ratios and "A" and "O" waves, were analyzed.
• Velocity ratios differed significantly between normal sinus rhythm, atrial fibrillation, and post-surgical cases.
• "A" wave velocity correlated with pulmonary artery systolic pressure in pulmonary hypertension.
• Angiotensin II infusion increased the velocity ratio in dilated cardiomyopathy and controls, more pronounced in cardiomyopathy.

Conclusions:

• Pulsed Doppler analysis of hepatic venous flow is valuable for assessing cardiac function.
• Changes in hepatic venous flow patterns, particularly the velocity ratio, reflect atrial and ventricular function.
• A marked increase in the velocity ratio post-angiotensin II infusion suggests compromised cardiac function.