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Right Atrial hypertrophy
Left Atrial hypertrophy
Right Ventricular Hypertrophy
Criteria
Left Ventricular Hypertrophy
Criteria
Myocardial infarction :
Acute
Significant Q wave with typical ST segment elevation in the same lead.
Recent
- Significant Q wave
- Diminished R wave
- Twave inversion
- ST segment elevation
Old
Only characteristic abnormalities of the QRS are found.
- Significant Q wave
- Diminished R wave
Myocardial infarction by site:
Location | QRS abnormalities | Vessel affected |
Inferior | II, III, AVF | Terminal branches of LAD and or Right posterior descending |
Anteroseptal | V1, V2 | Distal LAD |
Anterior | V1, V2, V3, V4 | Proximal LAD |
Anterolateral | I, AVL, V4-V6 | Distal circumflex |
High lateral wall | Lead 1 and AVL | Proximal circumflex branch of LCA |
True posterior | No Qwaves. Leads showing reciprocal changes only: Tall R waves, tall T waves and ST depression in V1, V2 | Posterior descending |
Subendocardial | Non Q wave infarction Difficult to establish with certainty
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