Objectives: The purpose of this study was to develop an adenosine-independent, pressure-
derived index of coronary stenosis severity. Background: Assessment of stenosis severity …

Background The ability of the coronary vascular bed to dilate and thus increase blood flow to
the myocardium may be impaired in coronary artery disease, even in regions of myocardium …

Background To prevent atrial fibrillation (AF) recurrence after catheter ablation, pulmonary
venous isolation (PVI) at an antral level is more effective than segmental ostial ablation …

Background: His bundle pacing is a new method for delivering cardiac resynchronization
therapy (CRT). Objectives: The authors performed a head-to-head, high-precision, acute …

BACKGROUND NG-Monomethyl-L-arginine (L-NMMA), a specific inhibitor of nitric oxide
synthesis, was used to determine the effects of inhibition of nitric oxide synthesis in the …

Aims: To evaluate the classification agreement between instantaneous wave-free ratio (iFR)
and fractional flow reserve (FFR) in patients with angiographic intermediate coronary …

Objectives. The aim of this study was to use Doppler catheterization and sequential dynamic
positron emission tomography (PET) to investigate the role and time course of abnormal …

Background Adoption of fractional flow reserve (FFR) remains low (6-8%), partly because of
the time, cost and potential inconvenience associated with vasodilator administration. The …

Objectives. We sought to investigate the hypothesis that estrogen replacement therapy
ameliorates symptoms in postmenopausal women with syndrome X. Background. Syndrome …

Aims Left bundle branch area pacing (LBBAP) is a promising method for delivering cardiac
resynchronization therapy (CRT), but its relative physiological effectiveness compared with …