Cardiac devices refer to medical devices that are used to diagnose, monitor, or treat various heart conditions. These devices can include pacemakers, defibrillators, cardiac resynchronization therapy devices, implantable loop recorders, and left ventricular assist devices. These devices are designed to help regulate the heart's rhythm, improve its overall function, and prevent sudden cardiac arrest. Cardiac devices are typically recommended for patients with certain heart conditions, such as arrhythmias, heart failure, or coronary artery disease. These devices play a crucial role in managing and improving the heart health of patients, and ongoing research in this area focuses on developing new and more advanced devices to further enhance patient outcomes and quality of life.