A person who uses cocaine chronically may develop a number of changes in the electrocardiogram (ECG).
Patient selection: chronic cocaine use
Wave changes in the ECG that can be seen include:
(1) increased QRS voltage
(2) abnormal precordial R wave progression
(3) nonspecific ST-T wave changes
(4) ST elevation
Other changes include:
(1) tachycardia (sinus, supraventricular)
(2) QTc > 440 ms
(3) Brugada type 2 phenocopy
(4) left ventricular hypertrophy
(5) signs of old myocardial infarction
