Scintigraphic diagnosis of experimental pulmonary embolism with In-111-labeled platelets.

Stasis thrombi, radiolabeled with Tc-99m sulfur colloid, were produced in six dogs by the injection of human thrombin into isolated jugular vein segments. After release of the thrombi, scintigraphic images demonstrated 16 pulmonary emboli containing Tc-99m. Autologous platelets labeled by the In-111 oxine method were injected.

Ultrasonic measurement of prosthetic heart valve action.

An in-vitro study has been made of the echo patterns obtained during ultrasonic Time-Motion (T-M) scanning of commonly used prosthetic heart valves. Studies have been undertaken of Starr-Edwards, Beal, and Björk-Shilley valves. From the recorded traces information has been obtained regarding the orientations of the ultrasound beam to the central axes of the valves for which accurate measurements can be made.

Massive false aneurysm of the left ventricle with dysphagia.

A patient with a massive false aneurysm of the left ventricle following myocardial infarction is described. The pseudoaneurysm compressed the esophagus causing severe dysphagia, and contributed to advanced terminal cachexia.