Atrial Dyssynchrony Measured by Strain Echocardiography as a Marker of Proarrhythmic Remodeling and Oxidative Stress in Cardiac Surgery Patients

Figure 4

Action potentials and arrhythmic triggers in interatrial dyssynchronic patients. (a) Averaged action potentials from three different patients from each group; (b) quantification of action potential amplitude, resting membrane potential, maximum upstroke velocity (ΔV/), and the action potential duration at 30 and 90% of the repolarization from both groups. by -test; (c) arrhythmogenic triggers in 2 seconds traces from two dyssynchronic patients. The blue arrows mark delayed afterdepolarizations, which are very frequent in dyssynchronous patients. Green arrowheads indicate triggered events from early afterdepolarizations.

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