STEPWISE CARDIAC REHABILITATION ADJUSTMENT AFTER EXERCISE-INDUCED IMPLANTABLE CARDIOVERTER DEFIBRILLATOR SHOCK: A...

Area of Science:

• Cardiology
• Exercise Physiology
• Rehabilitation Medicine

Background:

• Implantable cardioverter defibrillators (ICDs) are crucial for managing life-threatening arrhythmias.
• Exercise-induced arrhythmias can trigger ICD shocks, necessitating careful rehabilitation strategies.
• Patients with multiple comorbidities present unique challenges for post-shock cardiac rehabilitation.

Observation:

• A 72-year-old male with heart failure, peripheral artery disease, and prior cardiac surgeries experienced recurrent ventricular fibrillation and ICD shocks during exercise.
• Initial rehabilitation attempts were complicated by non-sustained ventricular tachycardia during cardiopulmonary exercise testing, requiring percutaneous coronary intervention.
• Further adjustments to medication and heart rate monitoring allowed for gradual resumption of exercise, including cycling and walking.

Findings:

• A stepwise, individualized exercise program incorporating medication adjustments and heart rate monitoring facilitated safe exercise progression post-ICD shock.
• Peripheral artery disease-associated pain and elevated heart rate were potential contributors to exercise-induced ventricular tachycardia.
• The patient was discharged without recurrence of ventricular tachycardia, demonstrating the efficacy of the tailored rehabilitation strategy.

Implications:

• Personalized exercise strategies are vital for patients at high risk of exercise-induced arrhythmias, especially those with comorbidities.
• This case highlights the importance of a multidisciplinary approach in managing complex cardiac patients undergoing rehabilitation after ICD shocks.
• Optimizing medication and exercise parameters can mitigate arrhythmic risk and improve functional outcomes in patients with ICDs.