How long do t wave abnormalities take to show up on an ECG in a patient with cardiomyopathy?
If we are talking about congenital cardiomyopathy such as HOCM or ARVC, and a patient underwent an ECG age 20 with normal t waves, how long would it take to develop abnormal or inverted t waves?
Instantly, weeks, months, years?
What causes these inverted t waves in these conditions? Ischemia? Electrical shortage?