A patient with multiple Swiss cheese aspect coronary lesions: optical coherence tomography to guide coronary angioplasty.

Although spontaneous recanalization of coronary thrombi has been reported pathologically, it is rarely recognized in clinical practice. We presented a rare case of recanalized thrombi of the right coronary artery and distal left anterior descending artery in a patient with an anterior ST segment elevation myocardial infarction treated with primary percutaneous intervention of the proximal left anterior descending artery. Optical coherence tomography aspect of right coronary artery was consistent with a 'Swiss cheese' appearance that represented recanalization of organized thrombi. Optical coherence tomography has been essential to discriminate the underlying mechanism and may provide useful information for an appropriate treatment approach.