Intraoperative myocardial infarction is best diagnosed by: (AIPG 2011)
|B||Invasive arterial pressure|
|C||Central venous pressure|
|D||Transthoracic esophageal echocardiography|
Transthoracic esophageal echocardiography
1. ECG: Classically, hyperacute (tall) T waves (1st sign of MI in ECG)Q occurs within minutes of MI.
ST elevation (Pardee’s)Q or occur within 2 –3 hours.
T wave inversion occurs within 8-12 hrs and development of pathological Q waves (transmural infarction) follow over 18-24 hours to days.
Right coronary artery supply right ventricle, inferior wall of LV and posterior part of the interventricular septum. ECG is not a good tool to diagnose ischemia of the posterior part of interventricular septum.