Fig. 5
From: Another cause of cardiac tamponade: ruptured coronary artery aneurysm
a Photomicrographs of the coronary arterial wall showing medial cystic degeneration (10× magnification). No evidence of vasculitis was noted. Inset shows intima with atheromatous plaques (20× magnification). b Photomicrograph of the coronary arterial wall showing dissection of the coronary artery at the tunica adventitia (10× magnification)