MI Evolution
critical
MI Evolution (Progressive)
~2 hr
72bpm
RR833QT373
RR833msPR162msQRS113msQT373msQTc396ms
Active changes2/4
- Hyperacute T waves10%
- ST elevation30%
- Pathological Q waves55%
- T-wave inversion70%
Criteria
Findings
- •Acute phase: ST and T waves point TOWARD the infarct.
- •Established phase: Q waves and T waves point AWAY from the infarct.
- •Pathological Q waves signal necrosis — usually a permanent scar.