Postprocedural radial artery occlusion rate using a sheathless guiding catheter for left ventricular endomyocardial biopsy performed by transradial approach.BACKGROUND
 The present study demonstrates the safety and efficacy of a transradial access for EMB using a highly hydrophilic sheathless guiding catheter.
sheathless guiding catheter
Although radial artery pulse was confirmed by ultrasonic vascular Doppler after removal of the guide in 100% (18/18) of the patients, 50% (9/18) of the patients showed occlusion of the radial artery RAO) by duplex sonography proximal to the access site. 
ultrasonic vascular Doppler
Although radial artery pulse was confirmed by ultrasonic vascular Doppler after removal of the guide in 100% (18/18) of the patients, 50% (9/18) of the patients showed occlusion of the radial artery RAO) by duplex sonography proximal to the access site. 
duplex sonography
Colour Doppler ultrasonography of the right radial artery performed 24 h after the procedure revealed radial occlusion in 50% (9/18) of the patients. 
Colour Doppler ultrasonography