Demographics	Clinical symptoms	Signs	Diagnostic tests	Treatment and prognosis	Prognosis	References
66-year-old female	COVID-19 patient presented with tachycardia and palpitations on the 6th day of admission	HR: 175 bpm	EKG: Irregularly irregular rhythm with absence of P waves AF with RVR Echo: Preserved ventricular fraction with no other abnormality	IV Metroprolol, IV diltiazem and Carvedilol 30 mg every 6 h	Restoration of sinus rhythm with clinical recovery	[50]
84-year-old male	Shortness of breath, fever and generalized weakness	BP 136/75 O2 sat 99% Temp 36.8C HR ~ 68 RR ~ 23	EKG: Atrial flutter with varied AV block Chest CT: no pulmonary embolism Echo: normal LV and RV function and size, mild TR and mild atrial enlargement	IV dexamethasone and oral anticoagulation	Restoration of sinus rhythm with clinical recovery	[60]
29-year-old male	Fever, chills, sweats, palpitations, and shortness of breath	BP 127/72 O2 sat 91% Temp 38.05 C HR ~ 131 RR ~ 28	EKG: Irregularly irregular RR interval, no distinct P waves Chest CT: no pulmonary embolism Echo: Mildly dilated LV, severe global LV dysfunction, moderate RV hypokinesis, severe LA enlargement	IV Cardizem, Metrprolol and flecainide and oral anticoagulation with Eliquis	Restoration of sinus rhythm with clinical recovery	[60]
46-year-old black male	Fever, cough and shortness of breath	SBP 140 O2 sat 88% HR ~ 142 RR ~ 28	EKG: Atrial flutter, 2:1 AV block and ST-T changes Echo: preserved LV ejection fraction, no regional wall motion abnormalities	Amiodarone, digoxin bolus, -blockers, cardioversion 100 J and oral anticoagulation	Restoration of sinus rhythm with clinical recovery	[61]
59-year-old male	Palpitations, exertional dyspnea and fatigue	BP 134/90 O2 sat 96% Temp 37.3 C HR ~ 136 RR ~ 16	EKG: Atrial fibrillation with PR 134 bpm and abnormal R wave progression Chest CT: unremarkable Echo: moderate LV hypertrophy, LV ejection fraction 60%. Normal LV and LA size	IV followed by oral Diltiazem and cardioversion	Restoration of sinus rhythm with clinical recovery	[62]
56-year-old Hispanic male	Malaise and palpitations. Presented to the urgent care previously with fever, chills, night sweats, headaches and palpitations	BP 124/100 O2 sat normal Temp 38.8 C HR ~ 130–140 RR ~ 16	EKG: Atrial fibrillation with PR 131 bpm along with evidence of LV hypertrophy	IV Diltiazem and fluid bolus	Restoration of sinus rhythm with clinical recovery	[62]