Repolarization parameters in heart transplant subjects

Heart transplant (HT) patients were analyzed to see whether the QTc depends more on sex of donor or recipient Subjects: 20 male/male (recipient/donor); 21 female/male; 17 female/female; 15 male/female; 23 healthy male; 20 healthy female. Continuous measurement was used over five postural changes: supine, sitting, supine, standing and supine. Results: Significant QTc dependency on the sex of the recipient exists; no dependency on the sex of the donor was found. Heart transplant patients have lower coupling between heart intervals (RR) and QT intervals, lower RR reaction on postural changes and longer QTc than healthy subjects. The only dependency on the sex of the donor was found in heart rate in group of males with female hearts.