Pacemaker Market - Global Industry Size, Share, Trends, Opportunity, and Forecast, Segmented By Type (Implantable and External), By Technology (Dual Chamber, Single Chamber, Biventricular Chamber), By Product Type (MRI Compatible and Conventional), By Applications (Arrythmias, Congestive Heart Failure, Others), By End User (Hospitals, Cardiac Care Centers, Ambulatory Surgical Centers), By Region a