I found this online for 16 y.o boy who suffered from increased HR and lost in appetite
It really looks like a possible PE. S1Q3T3 pattern consistent with acute Cor pulmonale.
Old myocardial infraction
How did you know that based on what?
Congestive heart failure ?
I don’t know actually it might be
SA node arrhythmia
ischemic heart disease
Supravetricular tachycardia + I see p pulmonale