Transvenous endocardial pacemaker (PM) implantation is contraindicated in patients with a mechanical tricuspid prosthesis. These patients usually undergo epicardial lead implantation. This case shows the implant of left ventricular (LV) pacing lead through the coronary sinus (CS) in a patient with high surgical risk. A 77-year-old woman with slow atrial fibrillation, left anterior hemiblock and...

Case report A 34-year-old man with a history of congenital complete heart block who underwent dual-chamber pacemaker implant at age 6 and multiple generator changes was referred for device replacement and lead extraction owing to malfunctioning atrial and ventricular leads. He underwent lead extraction of a dual-chamber pacing system with subsequent reimplantation of a Medtronic Viva CRT pacema...

I. Moss AJ, Rivers RJ Jr, Griffith LSC, Carmel JA, Millard EB Jr: Transvenous left atrial pacing for the control of recurrent ventricular fibrillation. N Engl J Med 278: 928, 1968 2. Moss AJ, Rivers RJ Jr, Cooper M: Long-term pervenous atrial pacing from the proximal portion of the coronary vein. JAMA 209: 543, 1969 3. Kramer DH, Moss AJ: Permanent pervenous atrial pacing from the coronary vein...

Case report An 83-year-old man was an emergency referral to our institute from the heart rhythm department of another clinic. Fifteen days prior, he underwent atrioventricular pacemaker implantation (Medtronic Sensia DR; Medtronic Inc, Minneapolis, MN) because of sick sinus syndrome with active fixation of an atrial lead (Flextend 2, Model 4096; Boston Scientific, St Paul, MN) and passive fixat...

One of the hazards of endocardial cardiac pacing is that the pacemaker lead may perforate the myocardial wall or interventricular septum although the incidence of such perforations is believed to be small. This paper describes what is believed to be a unique case in which a pacemaker lead perforated the atrial wall at implantation (or possibly shortly afterwards) and yet gave satisfactory right...

To examine the question of why the pacing rate and duration of atrial pacing are crucial factors in the successful interruption of atrial flutter, studies were performed on 30 patients in the period following open heart surgery. In each patient the diagnosis of atrial flutter was made using a pair of wire electrodes placed on the right atrial epicardium at the time of operation and brought out ...

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 ...

INTRODUCTION AND OBJECTIVES Recent studies have shown that rapid atrial pacing causes atrial electrical remodeling. However, the influence of the vagus nerve on atrial electrical remodeling is not clear. METHODS This study involved 24 dogs divided into three groups. In the control group, the inducibility of atrial fibrillation (AF) during vagal stimulation (VS(1)) was investigated. In the pac...

Background: Atrial fibrillation (AF) after coronary artery bypass graft surgery (CABG) constitutes the most commonly sustained arrhythmia and results in prolonged hospitalization. The purpose of this study was to assess simultaneous right and left atrial pacing as prophylaxis for postoperative atrial fibrillation. Method: One-hundred and twenty patients, without structural heart disease, who un...

Important questions exist about the relative roles of changes in heart rate versus extent of myocardial shortening in regulating fetal cardiac output, because increases in heart rate created by left atrial pacing have been shown to increase right ventricular output and decrease left ventricular output. Since the pacemaker site could importantly influence foramen ovale flow and, hence, each vent...