Atrial Fibrillation Atrial Flutter (Sawtooth with 300 P) (400: circus motion theory) (350-600bpm) (250-300bpm) P-frequency(P waves or fibrillation waves R-frequency(150-180; irregular pulse 1 s Ectopic Foci Two beats of sinus rhythm beat Tumultous twitching Ventricular Fibrillation Downslope of T(vulnerable period) 1 s Fig.11-11 Elevated ST- segment(anoxia reduces the Skou pump KMc
(250-300 bpm) (350-600 bpm)
A从J~人心 Wwyl Y的A ~ AyhkltnnnnnnM
ventricular Defibrillation 100 Volt of constant current(few ms) 400 Joule alternate current (100 ms) secon ECG with ventricular fibrillation A个M entricular action potential Vulnerable period (phase 3) KMC
Transmembrane SAN potentials recorded in different heart AVN regions BH PF TPF 300600ms
Transmembrane potentials recorded in different heart regions
Transmembrane potentials in epicardium and endocardium Epicardium myocardium 50 y 2000 BCL 2000 300 300 82 100 msec
Transmembrane potentials in epicardium and endocardium