the apex even without vasoactive maneuvers. On follow-up clinic visits two weeks and three months after discharge, the patient felt quite well, and auscultation of the heart revealed prominent late systolic click but no murmur. However, a late systolic murmur could again be precipitated by isometric exercise. DIscussIoN Until the past few years, a late systolic murmur at the apex, preceded by a...

IN OUR EXPERIENCE about 95 per cent of patent ducti have the typical machinery murmur, and present no problem in diagnosis. A continuous murmur maximal in the second to third left intercostal space usually means patent ductus arteriosus. Other sites usually indicate other lesions. The typical machinery murmur reflects a systolic and diastolic pressure gradient between the aorta and pulmonary ar...

IN OUR EXPERIENCE about 95 per cent of patent ducti have the typical machinery murmur, and present no problem in diagnosis. A continuous murmur maximal in the second to third left intercostal space usually means patent ductus arteriosus. Other sites usually indicate other lesions. The typical machinery murmur reflects a systolic and diastolic pressure gradient between the aorta and pulmonary ar...

The effects of passive head-up tilt on systolic time intervals were assessed in 18 patients with mitral valve prolapse. In addition to causing prolongation of the pre-ejection period and shortening of left ventricular ejection time, this circulatory stress led to progressive shortening of the Q to click interval. In 1 patient, a systolic click became audible which had not been heard in the supi...