Transcutaneous Pacing is the temporary means of pacing a patient's heart externally by delivering pulses of electric current through the patient's chest, which stimulates the heart to contract.

• A. Transcutaneous Pacing
• B. Internal Pacemaker
• C. External Defibrillation
• D. Cardiac Resynchronization Therapy

Answer: (A)

Transcutaneous pacing is a temporary, noninvasive way to pace the heart by placing electrodes on the chest and delivering electrical pulses through the skin to stimulate a contraction. That exactly matches the description given: external energy used to pace the heart without an implanted device.

In contrast, an internal pacemaker is a surgically implanted device that paces from inside the body. External defibrillation delivers a high-energy shock to reset a rhythm, not to generate a paced beat. Cardiac resynchronization therapy uses an implanted device to coordinate pacing of both ventricles to improve heart function, not a simple external chest pacing.