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Published on: October 14, 2016
Isointegral body surface maps and left ventricular hypertrophy in post-infarction heart failure patients
1Victor Babes, University of Medicine and Pharmacy Department of Pathophysiology Timisoara Romania. ioanamozos@yahoo.de
Aim:
Ventricular remodeling causes left ventricular hypertrophy (LVH) in myocardial infarction patients. We hypothesized that LVH can be evaluated using isointegral body surface maps.
Methods:
Thirty-two patients with post-infarction stable chronic heart failure underwent a 64-electrode body surface mapping (isointegral QRS, QRST, ST and STT maps) and 2-D echocardiography.
Results:
LVH was present in 16 of them (50%) according to 2D-echocardiography. Isointegral maxima increased and the minima were more negative in patients with LVH, and the differences were statistically significant for: isointegral QRS maxima (35±16 versus 60±21 mV.ms, p=0.0085) and minima (25±15 versus 69±14 mV.ms, p=0.0067), isointegral maxima and minima in the second third of the QRS complex, isointegral QRST minima and isointegral ST minima (5±2 versus 10±4 mV.ms, p=0.0026). Isointegral multipolar maps prevalence was increased in patients with LVH (75% versus 50%). Isointegral QRS and QRST maxima correlated best with the left ventricular mass (r=0.73 and 0.81).
Conclusion:
Body surface mapping is a useful method for the evaluation of patients with left ventricular hypertrophy in post-infarction heart failure. The most sensitive parameters are: isointegral QRS maxima and minima, especially in the second third of the QRS complex, isointegral QRST maps (minima, maxima and multipolarity) and isointegral ST minima.
