Placement of stiff guidewires through tortuous coronary arteries allows smooth advancement of stents during coronary intervention. However, the straightening of coronary vessels leads to a mechanical alteration and induces vessel wall shortening. The transient effect of such coronary pseudo-stenosis is referred as "accordion phenomenon". This case described the accordion phenomenon after placement of a stiff guidewire through a tortuous right coronary artery leading to acute total occlusion with ST elevation during coronary intervention.
Danny Hoi-Fan Chow, Chun-Leung Lau, Pui-Shan Chu, Ho-Chuen Yuen, Accordion Phenomenon: A Rare Cause of Acute Total Occlusion During Percutaneous Coronary Intervention Journal of the Hong Kong College of Cardiology 2014;22(2) https://doi.org/10.55503/2790-6744.1039