Methods Forty two patients referred for transesophageal echocardiography (TEE) were prospectively included. All TEE studies were performed with a three-dimensional transesophageal probe. For full-volume images, 4 gated beats were acquired for offline analysis. The cardiac cycle was divided in proto-systole (S1), mid-systole (S2) and tele-systole (S3) and proto-diastole (D1), mid-diastole (D2) a...

The major component of the normal first heart sound is that due to valvular closure. Preceding this there occur low frequency, low amplitude vibrations commonly attributed to auricular systole. It has been shown in this study that such vibrations appear invariably even though the auricles are fibrillating, and in heart block when auricular systole is widely seperated from ventricular systole. I...

Left ventricular length and calculated diameter were derived from angiocardiograms in 24 subjects with various heart diseases. Chamber diameter was noted to decrease an average of 27.5% from end-diastole to end-systole, and chamber length decreased 13%. Only subjects with calculations of left ventricular mass differing less than 25% from end-diastole to end-systole were accepted in order to avo...

Mitral valve prolapse (MVP) is defined as posterior displacement of all or part of MV leaflet(s) beyond MV annulus at least 2 mm into the left atrium (LA) during systole, with or without mitral leaflet thickening, but prolapsed leaflet(s) pointing towards apex in systole [1]. Mitral regurgitation (MR) is a common complication of MVP. Moreover, MVP with flail leaflet(s) is a severe form of MVP w...

Diffusion Tensor MRI (DTI) of the human heart in vivo has to date been performed in 2D and at a single phase of the cardiac cycle. Here we perform 3D tractography of the human heart in vivo at both end diastole and end systole. We show that fiber orientation in the subepicardium becomes more oblique during systole, and that scalar indices of diffusion (mean diffusivity and fractional anisotropy...

The systole of a closed Riemannian manifold is the minimal length non-contractible loop. We give uniform lower bound for large classes simple arithmetic locally symmetric orbifolds. establish new bounds translation semisimple element x in SL_n(R) terms its associated Mahler measure. use these geometric methods to prove existence extensions number fields which fixed sets primes have certain pres...