Final answer:
The most significant factor in the long-term survival of a patient with sudden cardiac death is the rapid institution of emergency services and procedures. AEDs and CPR are vital components of a timely response that can improve patient outcomes.
Step-by-step explanation:
The most significant factor in long-term survival of a patient who has experienced sudden cardiac death is B. Rapid institution of emergency services and procedures. When the heart's electrical activity is severely disrupted, leading to conditions such as ventricular fibrillation where the heart beats in a wild and uncontrolled manner, the most common treatment is defibrillation. Defibrillation stops the heart momentarily allowing the body's natural pacemaker to reset and resume a normal rhythm. Automated external defibrillators (AEDs) are critical in this process; they are portable devices found in many public places and can be operated by nonmedical personnel to diagnose the heart's condition and apply an appropriate electrical charge.
Furthermore, cardiopulmonary resuscitation (CPR) is a crucial life-saving technique that can be performed while waiting for medical professionals to arrive. By applying manual chest compressions, CPR can help to maintain some circulation and is often used in conjunction with an AED. Since timely and effective response is critical for survival and recovery, the rapid institution of these emergency services, including the use of AEDs and CPR, plays a vital role in improving patient outcomes after cardiac arrest.