Ankle exercise and venous blood velocity.

Ankle exercise increases venous blood velocity while supine, but the effect of ankle exercise on venous blood velocity while sitting is not known. In this investigation, we test the hypothesis that venous blood velocity can be increased while sitting by repetitive dorsiflexion of the foot. Time-averaged peak velocity (TAPV) in the popliteal vein of 20 healthy male volunteers was measured by pulsed Doppler ultrasound at rest and during ankle exercise in the supine and sitting positions.

Amiodarone-induced torsade de pointes in a patient with wolff-Parkinson-White syndrome.

Amiodarone is generally regarded to have a high safety profile with a low incidence of arrhythmias. However, there have been reports of torsades de pointes under certain conditions, such as electrolyte imbalance or concomitant antiarrhythmic therapy. We describe a case of amiodarone-induced torsade de pointes early after initiation of intravenous amiodarone in the setting of T-wave alternans.