急性下後壁心筋梗塞 ウェンケバッハ型2度房室ブロック
STEMI infero-posterioris. Mobitz I
ⅡⅢaVfでST上昇、V２，V3,で高いR波とST低下から急性下後壁心筋梗塞
PR間隔が徐々に延長してQRS波が脱落しているからウェンケバッハ型２度房室ブロック（ Mobitz I）This ECG shows ST elevation in inferior leads that’s mean STEMI inferior is present. Posterior STEMI is suggested by horizontal ST depressions, upright T Wave and tall R wave in right precordial leads.
PR interval is not constant. We can see progressive prolongation of this interval culminating with non conducted P wave, typical for second degree AVB, Mobitz I, that appear in P:QRS group with ratio 3:2 or 4:3.
Incomplete LBBB is present too.
Final diagnosis: a) STEMI infero-posterioris. Mobitz I
