Background. Shock delivery of an implantable defibrillator may cause a change in the amplitude of endocardial electrograms and impair the detection of ventricular fibrillation. Thus, the effects of shock discharges on the amplitude of endocardial electrograms were evaluated in five patients undergoing implantation of a cardioverter-defibrillator in combination with a new nonthoracotomy lead sys...

Recent studies have demonstrated that fibrillatory rhythms are not random phenomena but have definable patterns. However, standard mapping techniques may have limitations in their ability to identify the organization of fibrillation. The purpose of this study was to develop and apply a method, "ensemble vector mapping," for characterizing the spatiotemporal organization of fibrillation. Ventric...

Mrs. Heidari, 53 developed ventricular fibrillation and cardiopulmonary arrest after receiving 15 mL lidocaine 2% for local anesthesia at the Dr. Shariati Hospital Cathlab. There was no identified risk factor for her arrest preoperatively. She had a history of exertional chest pain for about 5 years and an electrocardiogram showed only inverted T-waves at the time of angiography. The case i...

INTERRUPTION of ventricular fibrillation with the use of drugs has generally been found to be unsuccessful. Previous work on local anesthetic agents suggested that such compounds could terminate ventricular fibrillation; however, Stearns, Maison and Stutzman reported little success with the use of procaine. Wegria and co-workers' conclude in their studies that procaine may stop fibrillation; ho...

An implantable cardioverter defibrillator (ICD) lead dislodgement into the right atrium is a dangerous situation, particularly in patients in atrial fibrillation because atrial fibrillation can be sensed as ventricular fibrillation and true ventricular fibrillation induced with an inappropriate shock. In the presence of shocks, ICD interrogation should be performed as soon as possible.

Background As part of a population-based study of acute myocardial infarction, we examined changes over time in the incidence and in-hospital case-fatality rates of primary ventricular fibrillation complicating acute myocardial infarction. Methods and Results Patients with validated acute myocardial infarction hospitalized at 16 hospitals in the Worcester, Mass, metropolitan area between 1975 a...

since the introduction of our local manufacturing of terfenadine, we have observed and expressed our concern about a small but increasing number of serious ventricular arrhythmias associated with the use of this non sedating antihistamine. in january 1997 a case of torsade de pointes ventricular tachycardia was detected in a previously healthy woman taking terfenadine with erythromycin. electro...

Of 160 patients who survived ventricular fibrillation complicating acute ischaemic heart disease, 80 had had a clinically mild coronary attack. Most of the long-term survivors had ventricular fibrillation within 24 hours of the onset of symptoms. The longterm prognosis of the survivors was similar to that of patients whose myocardial infarction was not complicated by ventricular fibrillation. T...

A rare case of hereditary spherocytosis (HS) and rheumatic mitral stenosis coexisting in a patient having severe stenosis, atrial fibrillation, symptoms the left ventricular dysfunction, along with hemolytic anemia attributed to HS. We present 58-year-old lady who presented emergency department complaints increasing shortness breath for past week. She was examined have fibrillation fast rate. O...

BACKGROUND As part of a population-based study of acute myocardial infarction, we examined changes over time in the incidence and in-hospital case-fatality rates of primary ventricular fibrillation complicating acute myocardial infarction. METHODS AND RESULTS Patients with validated acute myocardial infarction hospitalized at 16 hospitals in the Worcester, Mass, metropolitan area between 1975...