The primary objective of this study is to analyze the diagnostic accuracy of coronary CT angiography using 320 simultaneous detector results in patients with atrial fibrillation.

Inclusion Criteria:

• Suspected coronary artery disease based on clinical findings or findings on other noninvasive imaging tests and planned coronary angiography within the next 14 days.
• Able to understand and willing to sign the Informed CF.

Exclusion Criteria:

• Creatinine of above 2.0 mg/dl
• Age below 50 years
• Women of child bearing potential (no hysterectomy, no menopause, or menopause since less than 12 months) must demonstrate a negative pregnancy test performed within 24 hours before CT.
• Inability to hold the breath for 10 seconds

Patients with atrial fibrillation scheduled to undergo coronary angiography due to suspected coronary artery disease.