Final answer:
The purpose of AICD implantation post-CABG is to monitor and treat abnormal heart rhythms, particularly life-threatening ones like ventricular tachycardia or fibrillation. It is not primarily used for improving blood flow, preventing blood clots, or relieving chest pain, as those are addressed by other means.
Step-by-step explanation:
The purpose of AICD (Automated Implantable Cardioverter-Defibrillator) implantation post-revascularization such as CABG (Coronary Artery Bypass Grafting) is primarily to monitor and treat abnormal heart rhythms (arrhythmias). When arrhythmias become a chronic issue, an AICD can deliver electrical impulses to correct the rhythm. This is critical, especially in preventing life-threatening arrhythmias like ventricular tachycardia or ventricular fibrillation. Although a CABG procedure improves blood flow to the heart, it does not inherently manage arrhythmias, hence the need for an AICD in certain patients. Additionally, the AICD is equipped with sensors to detect bodily changes, such as during exercise, to adjust the heart rate accordingly, providing a responsive treatment to maintain a regular heartbeat.