Marked Qtc Reduction Immediately Following Direct Current Cardioversion of Atrial Fibrillation: Clinical Implications and Mechanisms

Cardiac Alternans: From Bedside to Bench and Back

“… 11 C , TWA in which TdP is initiated by a PVC falling on the large T-wave of the alternating beats. 23 D , TWA, followed sometime later by TdP initiated by a short-long-short sequence. 24 …”

“…For example, there are many published examples from LQTS patients in which TWA immediately precedes the onset of its signature arrhythmia, Torsade de pointes (Figure 1 B and C). [18][19][20][21][22][23] On the other hand, many episodes of Torsade de pointes also occur without immediately preceding TWA, often following a short-long-short sequence (Figure 1D). [24][25][26] Today, macroscopic TWA is used in assessing arrhythmia risk in patients with LQTS, 27 and microvolt TWA test is used for risk stratification for patients with heart failure.…”