Permanent pacemaker is the mainstay treatment indicated for bradycardia caused by sinus node dysfunction. However, heart failure may appear in patients with chronic right ventricle pacing, this known as Pacing-Induced Cardiomyopathy (PICM). There no internationally accepted definition diagnosis of PICM. Studies show prevalence PICM 9% first year and increases proportion to duration PPM implanta...

The effect of cardiac pacing, through a wide range of pacing rates, has been studied in 13 patients in stable sinus rhythm within 24 hours of operation. Using first atrial and then ventricular pacing, the cardiac rate was raised to 60% above control value. The effects of atrial and ventricular pacing were compared by observing the differences in the various parameters measured at corresponding ...

INTRODUCTION AND OBJECTIVES After cardiac surgery, temporary pacing leads are routinely implanted in the right ventricle (RV). The objective was to investigate the effect of different ventricular pacing locations on cardiac synchrony (by evaluating myocardial deformation, or strain) and efficiency in patients undergoing cardiac surgery. METHODS Interventricular asynchrony (i.e. the difference...

OBJECTIVE To investigate the short-term effects of atrial, atrioventricular, and ventricular pacing on myocardial oxygen consumption, myocardial blood flow, and cardiac efficiency in patients with coronary artery disease. DESIGN Prospective study that started at the end of diagnostic coronary angiography in 13 patients and was performed during atrial, atrioventricular, and ventricular pacing ...

AIMS Clinical trial data show that right ventricular pacing worsens cardiovascular outcomes. The underlying pathophysiology of this is undetermined. We studied the effects of right ventricular pacing on cardiac measures of vascular health (endothelial function), ventricular wall stress (B-type natriuretic peptide), and cardiac reserve (cardiac output response to exercise) in subjects with pacem...

Cardiac physiologic pacing (CPP), encompassing cardiac resynchronization therapy (CRT) and conduction system (CSP), has emerged as a strategy that may mitigate or prevent the development of heart failure (HF) in patients with ventricular dyssynchrony pacing-induced cardiomyopathy. This clinical practice guideline is intended to provide guidance on indications for CRT HF CPP pacemaker HF, patien...

OBJECTIVES Optimized temporary bi-ventricular (BiV) pacing may benefit heart failure patients after on-pump cardiac surgery compared with conventional dual-chamber right ventricular (RV) pacing. An improvement in haemodynamic function with BiV pacing may reduce the duration of 'Level 3' intensive care. METHODS Thirty-eight patients in sinus rhythm, ejection fraction ≤35%, undergoing on-pump s...

SUMMARY The hemodynamic effects of atrial pacing were evaluated in a group of 19 patients soon after cardiac valve surgery. Atrial pacing at 30 beats/min above the control rate of 88 beats/min produced an increase in cardiac index of 600 ml/min/m2. Isoproterenol was infused into eight of these patients to produce an increment in heart rate identical to that during atrial pacing. In these patien...