Wide QRS complex tachycardiaA 58-year-old man with hypertension and half a year ago documented left bundle branch block(LBBB)in his past history presented with progressive dyspnea.A pre-admission echocardiography showed severely depressed systolic left ventricular function[ejection fraction(EF)=27%],...
Sinus bradycardia can be defined as a sinus rhythm with a resting heart rate of 60 beats per minute or less. However, few patients actually become symptomatic until their heart rate drops to less than 50 beats per minute. The action potential responsible for this rhythm arises from the sinus...
In normal sinus rhythm, what does the P-wave, the PR interval, QRS complex, and QT interval reflect?Question:In normal sinus rhythm, what does the P-wave, the PR interval, QRS complex, and QT interval reflect?ECG:An ECG, or electrocardiogram, is an ele...
Prolonged and decremental antegrade conduction properties in right anterior accessory connections: Wide QRS antidromic tachycardia of left bundle branch bl... et al.Prolonged and decremental antegrade conduction properties in right anterioraccessory connections: wide QRS antidromic tachycardia of left bundle ...
The heart rate is typically used to describe how many beats per minute the heart generates. The heart rhythm generally is used to describe the pattern in which the heart beats. The normal cardiac rhythm that is typical is a normal sinus rhythm....
Response to adenosine during narrow QRS tachycardia and sinus rhythm: What is the mechanism?adenosineatrioventricular reentrant tachycardiaAVNRTnarrow QRS complexsupraventricular tachycardiaupper common pathwayEbstein's anomaly is often accompanied by either Wolff-Parkinson-White syndrome or atriofascicular Mahaim...
Sinus rhythmVentricular tachycardiaVentricular tachycardia (VT) substrate in left ventricular (LV) nonischemic cardiomyopathy (NICM) consists of fibrosis with surviving myocardium. The purpose of this study was to determine whether, in patients with LV NICM and sustained VT, reduced QRS amplitude and ...
Compari- son of Sotalol with Digoxin-Quinidine for conversion of acute atrial fibrillation to sinus rhythm (the sotalol-digoxin-quinidin trial). Am J Cardiol 1995; 76: 495-498.Halinen MO, Huttunen M, Paakkinen S, et al: Compar- ison of sotalol with digoxin-quinidine for conversion of ...
Wide complex tachycardia with atrioventricular dissociation and QRS morphology identical to that of sinus rhythm: a manifestation of bundle branch reentry. Heart 1996;76:541-7.Oreto G, Smeets JL, Rodriguez LM, Timmermans C, Wellens HJ. Wide complex tachycardia with atrioventricular dissociation and ...
Objective: We have developed a peak detection algorithm for accurate determination of heart rate, using photoplethysmographic (PPG) signals from a smartwatch, even in the presence of various cardiac rhythms, including normal sinus rhythm (NSR), premature atrial contraction (PAC), premature ventricle...