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 4 Comparison of QTD mean values in STEMI patients before and after PCI and SK treatments through paired t-test

	Mean	Standard deviation	t	P-value*
PCI
Before treatment	63.76	51.93	0.55	0.580
After treatment	59.71	28.79
SK
Before treatment	60.86	36.83	0.08	0.934
After treatment	60.52	32.81
PCI	− 4.00	60.20	− 0.45	0.934
SK	− 0.34	47.53

QTD QT dispersion, PCI percutaneous coronary intervention, SK streptokinase, STEM ST-elevation myocardial infarction, EF ejection fraction, 95% CI 95% confidence interval
Statistical significance where P < 0.05
^*Comparison between the two groups

ISSN: 1471-2261