Cardiac devices are essential tools used in the diagnosis and treatment of heart conditions. These devices, such as pacemakers and defibrillators, help regulate heart rhythms and can save lives by delivering electrical shocks when necessary. In addition to implantable devices, there are also external cardiac devices like ECGs that monitor heart activity. The advancements in cardiac technology have significantly improved patient outcomes, allowing for better management of conditions like arrhythmias and heart failure.