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Ventricular arrhythmic disturbances and autonomic modulation after beating-heart revascularization in patients with pulmonary normotensionKšela, Juš ...BACKGROUND: De-novo ventricular arrhythmias are potentially life-threatening complications after beating-heart revascularization (off-pump CABG). Whether pulmonary hypertension can influence ... initiation of ventricular arrhythmias through increased sympathetic activity is controversial. In order to determinethe influence of pulmonary hypertension on its relative contribution to ventricular arrhythmia, we first had to define the role of cardiac autonomic modulation in patients with pulmonary normotension. We aimed to observe how parameters of linear and nonlinear heart rate variability are changed pre- and postoperatively in patients with pulmonary normotension undergoing off-pump CABG. METHODS: Fifteen-minute ECG recordings were collected before and after off-pump CABG in 54 patients with multivessel coronary artery disease and pulmonary normotension to determine linear (TP, HF, LF, LF:HF ratio) and nonlinear detrended fluctuation analysis (alpha1, alpha2) and fractal dimension (average, high and low) parameters of heart ratevariability. Arrhythmia 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) ventricular arrhythmia was observed in 19 patients, and improvement from complex to simple arrhythmia in five patients (P = 0.022). Patients with postoperative deterioration of ventricular arrhythmia 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 patients with postoperative improvement of arrhythmia. CONCLUSION: Patients experiencing postoperative deterioration of ventricular arrhythmia already have impaired autonomic regulation before surgery. (Abstract truncated at 2000 characters)Source: Wiener Klinische Wochenschrift. - ISSN 0043-5325 (Jg. 121, hft. 9-10, 2009, str. 324-329)Type of material - article, component part ; adult, seriousPublish date - 2009Language - englishCOBISS.SI-ID - 25698265
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Kšela, Juš | 29766 |
Kališnik, Jurij-Matija | 21172 |
Avbelj, Viktor, 1956- | 03302 |
Suwalski, Piotr | ![]() |
Suwalski, Grzegorz | ![]() |
Geršak, Borut | 04768 |
Source: Personal bibliographies
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