Heart Remember or cardiac memory
Heart Remember or cardiac memory
■Background Can heart remember?
Background Can heart remember?
What is heart remembers? ■Heart remembers: >Characterized by Rosenbaum et al.in 1982 >T wave changes induced by ventricular pacing or arrhythmia that persist long after normal ventricular activation has resumed
What is heart remembers? Heart remembers: ➢ Characterized by Rosenbaum et al. in 1982 ➢ T wave changes induced by ventricular pacing or arrhythmia that persist long after normal ventricular activation has resumed
PRE-PACNG PACIG POST-PACNG drug 人3 T2 t.10
■Heart remembers: >Physiological process >Continuance and reversible process Persist for a variable period (minutes to months)
Heart remembers: ➢ Physiological process ➢ Continuance and reversible process ➢ Persist for a variable period (minutes to months)
B Pacing-Induced T Wave Changes On ECG in the Canine Heart CONT ROL VP DAY 7 DAY 14 DAY 21
Other terminology about heart remember -Heart remember is neither secondary T wave changes,nor primary T wave changes
Other terminology about heart remember Heart remember is neither secondary T wave changes, nor primary T wave changes
Secondary T wave changes:a change in ■ repolarization induced by an altered pathway of activation:bundle branch block; Wolff-Parkinson-White Syndrome et al
Secondary T wave changes: a change in repolarization induced by an altered pathway of activation: bundle branch block; Wolff-Parkinson-White Syndrome et al
-Primary T wave changes origin from: (a)structural (reflecting hypertrophy,myocyte destruction or fibrosis) (b)Hyperkalemia or hypokalemia induced; pharmacologic (antiarrhythmic drug induced). or pathologic(electrolytic abnormalities) (c)T wave evolution after myocardial infarction
Primary T wave changes origin from: (a) structural (reflecting hypertrophy, myocyte destruction or fibrosis) (b) Hyperkalemia or hypokalemia induced; pharmacologic (antiarrhythmic drug induced), or pathologic (electrolytic abnormalities) (c) T wave evolution after myocardial infarction
Heart remember electrotonic modulation T wave ■“electrical remodeling
Heart remember : electrotonic modulation T wave “electrical remodeling