His electrocardiogram showed normal sinus rhythms and poor R progression at precordial leads and ST depression at V5, 6. Exercise stress test showed ST depression at stage 2. Echo cardiogram showed preserved LV ejection fraction without significant wall motion abnormalities. Cardiac enzymes were within normal limits.
This case is successful negotiation of severely tight and hard calcified long standing CTO lesion that couldn't pass using the smallest 1.0mm sized conventional pre-balloon. The lesion could be negotiated using rotation of Cosair microcatheter technique.