This study shows that peripheral venous flow detected by Doppler ultrasound becomes synchronously pulsatile with heart beats as soon as central venous pressure (CVP) is above 7 mm Hg. CVP was above 7 mm Hg in 13 among 46 patients. Clinical signs of right heart failure were detectable in only 7 of these 13 patients (sensitivity 54%), whereas peripheral venous flow was pulsatile in 12 of them (sensitivity 92%). In 4 patients with a normal CVP, peripheral venous flow was also pulsatile; all of them suffered from valvular heart disease with left ventricle ejection fraction below 60% in 3 of them. The detection of a pulsatile peripheral venous blood flow constitutes an early sign of right heart failure, more sensitive than clinical evaluation, and probably even more than CVP.

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