Table 1. The karyotype distribution among woman with TS and an electrocardiogram.

Karyotype	Percent	hQTc >460 ms
45,X	60.2	4 of 53
Mosaic	39.8
45,X/46,XX/47,XXX; 45,X/46,XX; 45,X/47,XXX	3.4	1 of 3
45,X/46,X,r(X);	4.5
Turner Mosaic with Y-material	5.7
Mosaic with isochromosom og dicentric chromosome	19.3	1 of 17
All other karyotypes	6.8