JACC Vol. 17, No. 2 lFebruary 3991215A

ASTY FOR ACUTE INFARCTION.

related tt3 preservation of left ventricukr function. Patency of the IRA is important for function, but is not an independent survival.

NONINVASIVE TILT TABLE TBSTS: EFFEC OF ISO~~OT~~ENOL, DURATION OF TILT, AF’D RATE-PRESSURE ODUCT ON DO AGNOSI S OF SVNCOPE. Robert S. Sheldon, Jan Splawinski, ‘Shawn B.

Curren; isoproterenol (IS osed syncope (S ) is lengthy and uses

intra-arterial We wished to the contribution t and test out IS0 infusion, duration of HUT, and changes cs in a noninvasive protocol. 49/60 pts (82 nosed S who underwent Jrsccessive HUT with IS0 infusions of 0, 2 and 5 in developer’ S (34 pts) or presyncope ( 15 pts). Tests wnre negative in O/11 pts with other known causes of S. Need for ISO: 8% of 72 positive tests with S without ISO; 11% ended with S IS0 2

in <0 min of HUT tiith

positive tests in <6 min and (5)