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References in periodicals archive ?
The R-R interval variation and RRIV with hyperventila- tion studies (RRIV HV) were performed using two cup electrodes placed on the precordial region and results were evaluated according to the formula de- scribed by Shahani.
The most general advantage of body surface potential maps (BSPM) is the fact that they record cardiac potentials from broad areas of the chest, thus enabling the detection of significant physiologic and possibly diagnostic information outside the precordial regions usually explored.