Table 1.

Summary of major reports on diphtheritic myocarditis

S.n	Study details	Number of patients	Patients with myocarditis	Interval	ECG findings
1	Dung et al., Vietnam, 2002		32 patients requiring pacemaker		A temporary pacemaker in all- 7 survived, 25 died
2	Kneen et al., Vietnam, 2004	154	32 (21%)		First/ second/third-degree Heart blocks-7, BBB (7), Ischaemic changes (13), ectopics (12), increased QT (8)
3	Jayashree et al., Chandigarh, India, 2005	48	32 (67%)	6.5 +/-2.4 days	BBB (6), complete heart block (9), ventricular tachycardia (6), supraventricular (2), junctional tachycardia (2)
4	Celik et al., Turkey, India, 2006		32		LBBB and inverted T waves – a risk factor for long term mortality
5	Kole et al., Kolkata, India, 2010	200	136 (68%)		T-wave inversion (86), AV conduction block (8), RBBB (4), ST-T changes (4), multiple atrial ectopics (6)
6	Samdani et al., Jaipur, India, 2017		60		T wave inversion(20%), ST depression (13.3%), RBBB (5%), multiple atrial ectopics (3.3%)
7	Meera et al., Hyderabad,India, 2019	435	83 (19%)	1
8	Dash et al., Chandigarh, India, 2019	99	35 (35%)	8.5 days	Conduction abnormality and heart block (9), ST depression (5), Ventricular tachycardia (7), Ventricular premature beats (2), Prolonged PR interval (2)