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Impact of finite orifice size on proximal flow convergence. Implications for Doppler quantification of valvular regurgitation.
TLDR
Numerical and in vitro modeling demonstrated hemispheric shape for contours more than two orifice diameters from the orifice, and the calculated flow correlated well with the true flow.
Impact of Impinging Wall Jet on Color Doppler Quantification of Mitral Regurgitation
TLDR
Jet morphology should be considered in the semiquantitative interpretation of mitral regurgitation by Doppler color flow mapping after it was hypothesized that a jet impinging on a wall would lose momentum more rapidly, undergo spatial distortion, and thus have a different observed jet area from that of a free jet with an identical flow rate.
[Is percutaneous transluminal coronary angioplasty in chronic total coronary occlusion justified? Long term results in a series of 201 patients].
TLDR
Results indicate that in patients with chronic total coronary occlusions, the success of angioplasty has a favourable effect on long-term outcome both in terms of survival and in quality of life.
Comparative effects of atenolol and clonidine on polygraphically recorded sleep in hypertensive men: a randomized, double-blind, crossover study.
TLDR
Atenolol tends to decrease total sleep time but does not affect the normal architecture of sleep, clonidine has a marked hypnotic effect, similar to that of some sedative medications and significantly reduces REM sleep.
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