Defibrillator abolishes disorganized electrical activity of the heart by giving a high voltage shock so that the heart restarts on its own in normal rhythm.
Myocardial infarction is the medical name for heart attack. It is damage to a region of heart muscle due to abrupt cessation of blood supply to that region.
Right bundle branch taking signals to right ventricle can often have a conduction delay and the manifestation on ECG is called right bundle branch block.
Plaques can be removed from your artery by a process known as atherectomy. Various types of atherectomy are: rotational, directional and laser atherectomy.