New insights in radial artery vasomotion and non-occlusive injury

after TRI: an IVUS study

Tift Mann, MD, FACCRaleigh, NC, USA

RADIAL ARERTY IVUSEffect of Sublingual NTG and Intra-arterial Verapamil

Baseline After SBL NTG After IA Verapamil

(NTG : nitroglycerin)

EFFECT OF SL NTG and IA VERAPAMIL ON RADIAL Artery IVUS AREA

3

4

5

6

7

8

9

RA

Are

a, m

m3

44% increase

Repeat procedure: intimal hyperplasia from previous sheath

Previous RA cath decreases RA size but not responsiveness to NTG and VERAPAMIL

3

4

5

6

7

8

9

10

11

RA

Are

a,

mm

2

No prior RA cath Previous RA cath

** P<.01