Ventricular arrhythmic disturbances and autonomic modulation after beating-heart revascularization in XXXX with @entity358 .

@entity1 @entity120 @entity358 @entity86 @entity453 @entity943 @entity6927
BACKGROUND: De-novo @entity943 are potentially life-threatening complications after beating-heart revascularization (off-pump CABG). Whether @entity120 can influence initiation of @entity943 through increased sympathetic activity is controversial. In order to determine the influence of @entity120 on its relative contribution to @entity943 , we first had to define the role of cardiac autonomic modulation in @entity1 with @entity358 . We aimed to observe how parameters of linear and nonlinear heart rate variability are changed pre- and postoperatively in @entity1 with @entity358 undergoing off-pump CABG. METHODS: Fifteen-minute ECG recordings were collected before and after off-pump CABG in 54 @entity1 with multivessel @entity453 and @entity358 to determine linear (TP, HF, LF, LF:HF ratio) and nonlinear detrended fluctuation analysis ( @entity6927 , alpha2) and fractal dimension (average, high and low) parameters of heart rate variability. @entity943 was monitored preoperatively in 24-hour Holter recordings and postoperatively by continuous monitoring and clinical assessment. RESULTS: Deterioration from simple (Lown I-II) to complex (Lown III-V) @entity943 was observed in 19 @entity1 , and improvement from complex to simple @entity943 in five @entity1 (P = 0.022). @entity1 with @entity86 of @entity943 had preoperatively significantly lower values of TP, HF and LF (P = 0.024-0.043) and postoperatively significantly higher values on the low fractal dimension index (P = 0.031) than @entity1 with postoperative improvement of @entity943 . CONCLUSION: @entity1 experiencing @entity86 of @entity943 already have impaired autonomic regulation before surgery. Higher postoperative values on the low fractal dimension index indicate that sympathetic predominance with or without concomitant vagal withdrawal is the underlying neurogenic mechanism contributing to @entity943 .
