Statins are drugs like atorvastatin which inhibits cholesterol synthesis by inhibiting the liver enzyme HMG Co A reductase, which is more active at night.
When conduction through left bundle is delayed or blocked, a characteristic pattern is seen on ECG, which is known as the left bundle branch block (LBBB).
An atrial septal defect (ASD) can be repaired even without surgery by a catheter based device which can occlude the defect with a clam shell like ASD device