Comparison of QT dispersion in patients with ST elevation acute myocardial infarction (STEMI) before and after treatment by streptokinase versus primary percutaneous coronary intervention (PCI)

Table 2 Comparison of QTD mean values among different arrhythmia types after using PCI and SK therapies in STEMI patients

	Frequency	Mean	Standard deviation	95% CI		P-value*
PCI
VT	8	10.00	35.45	− 19.64	39.64	0.022
VF	2	− 20.00	28.28	− 274.12	234.12
VT and VF	1	− 120.00	–	–	–
Total	11	− 7.27	50.01	− 40.87	26.32
SK
VT	12	− 6.66	33.39	− 14.55	27.88	0.489
VF	3	− 13.33	46.18	− 128.07	101.40
VT and VF	2	− 20.00	28.28	− 274.12	234.12
Total	17	0.00	34.64	− 17.81	17.81

QTD QT dispersion, PCI percutaneous coronary intervention, SK streptokinase, STEM ST-elevation myocardial infarction, VT ventricular tachycardia, VF ventricular fibrillation, 95% CI 95% confidence interval
Statistical significance where P < 0.05
*Comparison among the three different categories

ISSN: 1471-2261