- Fractional flow reserve (FFR) measurement NOT intended to be done in case of CTO because of False positive result because of recruitment of collaterals.
- FFR is influenced by the amount of myocardium subtended by a stenosis
- Presence of a CTO could thus lead to a “false positive” FFR in the donor vessel.
- After CTO-PCI, recruitment of collaterals rapidly diminished, with the donor vessel going back to supply a smaller volume of myocardium with a consequent trend towards normalization of FFR values
Fractional flow reserve (FFR) measurement NOT intended to be done in case of
[A] Identify the precise location of a coronary lesion
[B] Identify appropriate culprit lesion in multivessel coronary artery disease
[C] Angiographically intermediate LCX lesion
[D] Chronic total occlusion
- Fractional flow reserve (FFR) measurement involves determining the ratio between the maximum achievable blood flow in a diseased coronary artery and the theoretical maximum flow in a normal coronary artery.
- An FFR of 1.0 is widely accepted as normal.
- An FFR lower than 0.75-0.80 is generally considered to be associated with myocardial ischemia (MI)
- It provides a quantitative assessment of the functional severity of a coronary artery stenosis identified during coronary angiography and cardiac catheterization.
Indications
Indications for FFR measurement are as follows:
- To determine the physiologic and hemodynamic significance of an angiographically intermediate coronary stenosis
- To identify appropriate culprit lesion(s) in multivessel coronary artery disease (CAD)
- To measure the functional importance of stenosis in the presence of distal collateral flow
- To identify the precise location of a coronary lesion when the angiographic image is unclear
Note that this procedure is not intended for use in the setting of a total vessel occlusion.
Ovulation Induction: Procedure, Drugs & Protocols – FEMELIFE
Ovulation induction offers a solution for the large percentage of women with disorders of anovulation and irregular cycle.
Double-density sign – Cardiology Outlines
Double-density sign Double-density sign is seen in [A] LA enlargement[B] RA enlargement[C] LA and RA enlargement[D] RV enlargement ANSWER[A] LA enlargement Double-density sign Also known as the double right heart border Left atrial enlargement – Seen on frontal chest radiographs in the presence of -…