Approval for the model 4170 bedside single chamber, external pulse generator.  The model 4170 is indicated for "any clinical situation in which the use of temporary pacemaker on a patient provides therapeutic or diagnostic value, or serves a prophylactic purpose.  Specifically, indications for temporary pacemakers include, but are not limited to, the following:  intermittent or complete heart block associated with asystole or bradycardia, symptomatic sinus bradycardia, surgically-induced heart block and heart block accompanying an acute myocardial infarction."