Variables Case.1 Case.2 Case.3 Case.4
Age (in months) 43 38 40 32
Gender Female Male Male Male
Presenting complaint Neonatal ECG (Bradycardia with varying T morphology) Screening for strong family history Recurrent Syncope Recurrent Syncope
Sudden cardiac arrest Yes No No Yes
Congenital sensorineural hearing loss Yes Yes Yes Yes
QTc interval 550 ms 600 ms 670 ms 540 ms
Family history No Yes Yes Yes
Modified Schwartz criteria score 7 7.5 6.5 5.5
Echocardiography PDA Normal Normal Normal
Pre-operative β-blocker Yes Yes Yes Yes
Symptom status on β-blocker No Syncope with seizures Yes Yes
Significant events VT during PDA device closure None Bradycardia after β-blocker None
Level of sympathetic denervation (Lower half of stellate ganglion till) T5 T3 T4 T4
Additional procedure PDA ligation None None None
Approach Left posterolateral Thoracotomy Left posterolateral Thoracotomy Left posterolateral Thoracotomy Left posterolateral Thoracotomy
Pacing intervention Epicardial: Single chamber None Epicardial – Dual chamber ILR
Follow-up Asymptomatic Asymptomatic Asymptomatic Asymptomatic