Resistance exercise acutely elevates dynamic cerebral autoregulation gain.

Dynamic cerebral autoregulation (dCA) describes the regulation of cerebral blood flow (CBF) in response to fluctuations in systemic blood pressure (BP). Heavy resistance exercise is known to induce large transient elevations in BP, which are translated into perturbations of CBF, and may alter dCA in the immediate aftermath. This study aimed to better quantify the time course of any acute alterations in dCA after resistance exercise.

A randomized optical coherence tomography study of coronary stent strut coverage and luminal protrusion with rapamycin-eluting stents.

Objectives: We used optical coherence tomography, which has a resolution of <20 microm, to analyze thin layers of neointima in rapamycin-eluting coronary stents.

Background: Lack of neointimal coverage has been implicated in the pathogenesis of drug-eluting coronary stent thrombosis. Angiography and intracoronary ultrasound lack the resolution to examine this.

Percutaneous coronary intervention of a circumflex chronic total occlusion using an epicardial collateral retrograde approach.

Antegrade disobliteration of a chronic total coronary occlusion (CTO) may be technically difficult in spite of the use of customized equipment. Retrograde approaches via intramyocardial septal or bypass grafts have been described. We report a successful Percutaneous intervention of a proximal circumflex CTO using a retrograde approach via an epicardial collateral.