David Crosby underwent heart catheterization on Friday following a routine cardiac stress test.

Crosby's left anterior artery was found to be 90% blocked, and two stents were placed to improve flow to his heart.  It's a routine procedure and the 72 year old rock 'n roll icon is expected to make a full recovery.

David went on to say, "I am very glad that I listened to my doctors and my family.  It seems I am once again a very lucky man.  I'm sorry to have to move the dates [on the tour], but I promise the music will be good when we do play them."

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