Table 1.

Patient characteristics and data.

Patient	Age (year)	Sex	Relevant past medical history	Initial clinical presentation	Relevant laboratory results on admission	Findings on admission EKG	Days between COVID-19 diagnosis and onset of persistent bradycardia	Findings on EKG(s) after onset of persistent bradycardia
1	45	Male	Hypertension	Weakness, shortness of breath, and dizziness	Troponin: <0.012 Potassium: 3.6 Creatinine: 0.7 TSH: 0.205	Sinus tachycardia; intervals within normal limits; no conduction system blocks	10 days	Hospital day 4: Sinus bradycardia; intervals within normal limits; no conduction system blocks
2	34	Female	Type II diabetes mellitus	Shortness of breath	Troponin: <0.012 Potassium: 4.0 Creatinine: 0.8 TSH: 0.515	Sinus tachycardia; intervals within normal limits; no conduction system blocks	9 days	Hospital day 8: Sinus bradycardia; intervals within normal limits; no conduction system blocks
3	60	Female	Hypertension, hypothyroidism, type II diabetes mellitus	Shortness of breath, cough, fever, myalgias	Troponin: <0.012 Potassium: 4.2 Creatinine: 0.7 TSH: 0.667	Normal sinus rhythm; intervals within normal limits; no conduction system blocks	6 days	Hospital days 3, 4, & 6: Sinus bradycardia; intervals within normal limits; no conduction system blocks
4	67	Female	Hypertension, hypothyroidism, deep vein thrombosis, anxiety disorder	Shortness of breath, cough, fever	Troponin: <0.012 Potassium: 4.1 Creatinine: 0.5 TSH: 0.139	Normal sinus rhythm; intervals within normal limits; no conduction system blocks	12 days	Hospital day 6: Sinus bradycardia; intervals within normal limits; no conduction system blocks
5	54	Male	Hypertension, obstructive sleep apnea	Shortness of breath	Troponin: <0.012 Potassium: 4.1 Creatinine: 0.5 TSH: 0.508	Normal sinus rhythm; intervals within normal limits; no conduction system blocks	8 days	Hospital day 10: Sinus bradycardia; intervals within normal limits; no conduction system blocks Hospital day 15: Sinus bradycardia; prolonged QT/QTc interval (482/477 milliseconds); no conduction system blocks
6	41	Male	Hypertension, obesity	Shortness of breath	Troponin: <0.012 Potassium: 4.9 Creatinine: 0.6 TSH: NA	Normal sinus rhythm; intervals within normal limits; no conduction system blocks	9 days	Hospital day 4: Sinus bradycardia; intervals within normal limits; right bundle branch block, left posterior fascicular block Hospital day 8 (discharge day): Sinus bradycardia; intervals within normal limits; no conduction system blocks