Role of electrophysiologic testing in the diagnosis and treatment of patients with known and suspected bradycardias and tachycardias

Syncope: Overview and Approach to Management

“…1.7 and Table 1.15. Abnormal test results are seen in 7-50% of patients selected for study [17,41,[43][44][45][206][207][208][212][213][214][262][263][264][292][293][294][295][296][297][298]. Results are disease-specific.…”

Identification of Multiple Pathways in the Wolff-Parkinson-White Syndrome

“…Thus, a Kent's bundle and a Mahaim's bundle may occur in combi nation [13] The phenomenon of enhanced atrioventricular nodal conduction has also been suggested to be caused by accessory pathways [3,4,14], although there is still no convincing evidence of an anatomical sub strate in this condition [14][15][16], which is fre quently accompanied by tachycardias [17].…”

Ventricular electrophysiology in congestive heart failure and its correlation with heart rate variability and baroreflex sensitivity: a canine model study

“…Stimulation intensity was two times of the pacing threshold in the diastole, and pulse width was 1.8 ms. Ventricular effective refractory period was defined as the longest S 1 S 2 interval that did not evoke ventricular depolarization. 20 Ventricular late repolarization duration, the portion of the action potential subsequent to the effective refractory period, was measured as the difference between the local ventricular MAP (MAPD 90 ) and the VERP at the same cardiac cycle length. Monophasic action potential duration was the interval, along a line horizontal to the diastolic baseline, from the onset of zero phase depolarization to the 90% repolarization level.…”