Six patients with spontaneous angina associated with transient ST segment elevation had a multistate maximal exercise (bicycle) test. In 5 patients, typical electrocardiographic changes were recorded during exercise, namely ST segment elevation often accompanied by an increase in the voltage of the R wave and a widening of the QRS complex. Four of these patients developed severe rhythm disturba...

The clinical effects and treatment of imipramine and amitriptyline poisoning have been reviewed by Giles (1963) and Steel, O'Duffy, and Brown (1967). The majority of cases are mild and recover spontaneously. The severe case is characterized by coma, convulsions, and cardiac arrhythmias. There is the added risk of respiratory depression and hypotension. Poisoning is severe if the dose of the dru...

Interruption of anterior fibers of the left bundle branch system together with right bundle branch block was accomplished experimentally in canine and primate hearts. In both species the electrocardiographic effects included a major alteration of the mean electrical axis to a superior and anterior direction. Epicardial excitation was markedly delayed anteriorly, causing widening of the QRS comp...

►Implication for health policy/practice/research/medical education: This report demonstrates new criteria for patient selection in CRT era. We started diagnosing Bundle Branch Block about 100 years ago on dog models (1). However, about 40 years passed until we could diagnose Left Bundle Branch Block (LBBB) correctly on ECG (2). Today, we have conventional criteria for diagnosing LBBB, including...

BackgroundConduction and rhythm abnormalities requiring PPM are few of the complications following TAVR, their clinical outcomes remain unclear. The potential value novel predictors post-TAVR PPM, such as presence supraventricular arrhythmias, QRS duration, duration QTc is unclear.MethodsA retrospective cohort study patients with TAVR (January 2012-December 2019) was performed. group dichotomiz...

background : left ventricular (lv) dyssynchrony is a prevalent feature in heart failure (hf) patients. the current study aimed to evaluate the prevalence of inter and intraventricular dyssynchrony in hf patients with regard to the qrs duration and etiology. methods: the available data on the tissue doppler imaging (tdi) of 230 patients with refractory hf were analyzed. the patients were divided...

Right ventricular apical pacing has been a commonly used method for placement of permanent pacemaker, but it is known to be associated with ventricular dyssynchrony and may lead to heart failure. Septal pacing could be an alternative method to improve this complication but the results have been conflicting; hence, other strategies are needed. This case is about a patient with pacing-induced car...