Читать книгу Interventional Cardiology - Группа авторов - Страница 123

Side holes help to maintain coronary perfusion when there is ostial obstruction by the guide catheter that results in pressure dampening. This can occur when using a larger guide caliber, in the presence of aorto‐ostial disease, non‐coaxial engagement, and in small caliber arteries encountered in smaller patients, often women. Side holes can reduce contrast opacification of the arteries with a consequent reduction in image quality and increased overall contrast dye utilization. The persistence of aortic pressure morphology can mask severe catheter‐induced pressure dampening which is of importance for measuring fractional flow reserve and may not always protect from hydraulically induced vessel dissection [2].