Ectopic Rhythms and Premature Depolarizations
Ectopic Rhythms and Premature Depolarizations Ectopic depolarizations can arise from many areas of the heart, but the surface ECG is markedly limited in its ability to precisely define the origin…
Atrioventricular Conduction
Atrioventricular Conduction The usefulness of intracardiac recording and stimulation techniques in humans was first realized during its application to patients with disorders of atrioventricular (A-V) conduction. Electrophysiologic study allowed confirmation…
Miscellaneous Phenomena Related to Atrioventricular Conduction
Miscellaneous Phenomena Related to Atrioventricular Conduction Concealed conduction, the gap phenomenon, and supernormality are physiologic events that may be considered to be variants of the normal response. These phenomena are…
Electrophysiologic Investigation: General Concepts
Electrophysiologic Investigation: General Concepts The electrophysiologic study should consist of a systematic analysis of dysrhythmias by recording and measuring a variety of electrophysiologic events with the patient in the basal…
Sinus Node Function
Sinus Node Function Disorders of sinus node function are an important cause of cardiac syncope. Approximately 50% of permanent pacemakers implanted at our own and other institutions are for the…
Electrophysiologic Investigation: Technical Aspects
Electrophysiologic Investigation: Technical Aspects Personnel The most important aspects for the performance of safe and valuable electrophysiologic studies are the presence and participation of dedicated personnel. The minimum personnel requirements…
Profiles in Peripheral Arterial Disease
Profiles in Peripheral Arterial Disease Christopher J. White Stephen R. Ramee STROKE INTERVENTION Early reperfusion therapy for acute stroke, similar to that for acute myocardial infarction, offers the best opportunity…
Profiles in Congenital Heart Disease
Profiles in Congenital Heart Disease Gabriele Egidy Assenza Robert Sommer Michael J. Landzberg Congenital heart disease has become more common not only in the pediatric but also in the adult…
Profiles in Pericardial Disease
Profiles in Pericardial Disease John F. Robb Roger J. Laham Mauro Moscucci Drs. Beverly Lorrell and William Grossman contributed material for this chapter in previous editions. Pericardial disease can manifest…
Profiles in Cardiomyopathy and Heart Failure
Profiles in Cardiomyopathy and Heart Failure James C. Fang Barry A. Borlaug Heart failure (HF) is a chronic progressive condition that arises when the heart cannot provide adequate cardiac output…
