Milking effect

Last revised by Daniel J Bell on 6 Mar 2020

Milking effect phenomenon is a pathognomonic angiographic finding in myocardial bridging of coronary arteries. Systolic compression of coronary vessels with partial or complete decompression during diastole is described as milking effect. Its significance lies in: 

  • increased risk of thrombus formation
  • increased risk of coronary spasm

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