Christensen, Clayton M. "We've Got Rhythm! Medtronic Corp.'s Cardiac Pacemaker Business (TN)." Harvard Business School Teaching Note 698-056, March 1998.

and to determine whether permanent cardiac pacemakers may be beneficial in the treatment of myotonic dystrophy heart disease. Background: Myotonic dystrophy affects the cardiac conduction system.

The only effective treatment we have currently for their heart block is cardiac pacemaker implantation. The degree of heart disease must be weighed against the degree of other systemic disease ...

Zoll employed an extrathoracic cardiac pacemaker in which relatively high voltages (15–100 volts) were introduced across the closed chest to cause a resumption of ventricular systole in patients ...

Nevertheless, it is recommended that capsule endoscopy is not performed in patients with cardiac pacemakers or other electronic devices because of the possibility of electronic interference ...