"Supernormal" conduction and excitability
Electrocardiographic manifestation of "supernormal" conduction is defined as conduction that is more rapid than expected or presence of conduction when block is anticipated. It is not supernormal in the sense or being more rapid than normal. Therefore, the term relative supernormality or "supernormality" is more appropriate. The mechanism of "supernormal" conduction is conduction during a period of supernormal excitability and conduction associated with altered membrane potential. Some of the more common phenomena that are not dependent on conduction during the supernormal period but manifest better than expected conduction, thus simulating "supernormal" conduction, include dual AV nodal conduction, the "gap" phenomenon, "peeling back" of the refractory period, summation of subthreshold responses, diastolic phase 4 depolarization, and phasic autonomic influences.
Suicidal and accidental digoxin ingestion. Report of five cases with serum digoxin level correlations
Retrograde invasion of the bundle branches producing aberration of the QRS complex during supraventricular tachycardia studied by programmed electrical stimulation
The effect of changes in rate and rhythm on supernormal excitability in the isolated Purkinje system of the dog. A possible role in re-entrant arrhythmias
Paroxysmal atrioventricular block related to hypopolarization and spontaneous diastolic depolarization
Unusual occurrence of nonaberrant conduction in patients with atrial fibrillation and aberrant conduction
Studies on the skeletal tissues. 4. The renewal of inorganic phosphate in bones of various species of small mammal as a function of time
The effect of the cardiac membrane potential on the rapid availability of the sodium-carrying system
Sino-auricular block, interference dissociation, and different recovery rates of excitation in the bundle branches
Shortening of the intraventricular conduction time in premature ventricular beats during ventricular extrastimulation: possible role of dimensional shortening of the conducting distance during ventricular systole
Supernormal conduction revealed by extremely late atrial extrasystole during phase 3 right bundle branch block
Supernormal conduction in the left bundle branch block revealed by relatively late atrial extrasystoles
An unusual onset of supraventricular tachycardia with 2:1 atrioventricular block: what is the mechanism?
Stepwise transition of 2:1 atrio-ventricular block to 1:1 conduction induced by ventricular premature beats in a patient with atypical AVNRT
Demonstration of phase-3 and phase-4 retrograde block in a second concealed accessory pathway after an initial successful radiofrequency ablation of a 'normal' concealed accessory pathway
Coexisting Hyponatremia and Decline in Diastolic Blood Pressure Predispose to Atrial Standstill in Hyperkalemic Patients
Myocardial bundles with slow conduction properties are present on the left interventricular septal surface of normal human hearts
Intermittent anterograde conduction in an accessory pathway during atrial pacing: what is the mechanism?
Four TRPM4 Cation Channel Mutations Found in Cardiac Conduction Diseases Lead to Altered Protein Stability
Inherited Cardiac Arrhythmia Syndromes: Focus on Molecular Mechanisms Underlying TRPM4 Channelopathies.
Cardiac Conduction System
The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.