Fractional Flow Reserve (FFR) and Instantaneous Wave-Free Ratio (iFR) are advanced diagnostic techniques used during coronary angiography to assess the severity of coronary artery blockages and determine whether a patient requires angioplasty or stent placement.
These specialized procedures help cardiologists measure blood flow within the coronary arteries and identify blockages that significantly affect heart function.
At Dr. Manish Juneja’s Heart Clinic, advanced FFR and iFR assessment is performed using modern cardiac catheterization technology to ensure accurate diagnosis and personalized treatment planning. As an experienced interventional cardiologist, Dr. Manish Juneja utilizes these advanced physiological tests to make informed decisions regarding coronary artery disease treatment.
What are FFR and iFR?
Coronary angiography is a minimally invasive procedure that uses X-ray imaging and contrast dye to visualize the coronary arteries. During the procedure, a thin catheter is inserted through the wrist or groin and guided to the heart. The contrast dye helps cardiologists identify any narrowing or blockage within the arteries.
It is considered the gold standard test for diagnosing coronary artery disease and assessing the severity of arterial blockages.
When is FFR / iFR Recommended?
FFR (Fractional Flow Reserve) and iFR (Instantaneous Wave-Free Ratio) are recommended when coronary angiography alone cannot clearly determine whether a blockage is significantly affecting blood flow to the heart. These advanced diagnostic techniques help cardiologists assess the functional severity of coronary artery narrowing and make more accurate treatment decisions. By measuring blood flow and pressure within the coronary arteries, FFR and iFR help determine whether medications, angioplasty, or stent placement are the most appropriate treatment options for the patient.
- Coronary angiography shows moderate artery narrowing
- The severity of blockage is uncertain
- Chest pain symptoms do not match angiography findings
- Multiple coronary artery blockages are present
- Further evaluation is required before angioplasty
- Coronary artery disease is suspected despite unclear imaging results
- Treatment planning requires precise blood flow assessment
Symptoms That May Require FFR / iFR Evaluation
Chest Pain (Angina)
Persistent chest pain or discomfort during physical activity may indicate reduced blood flow to the heart caused by coronary artery disease.
Shortness of Breath
Difficulty breathing during exercise or routine activities can occur when the heart muscle is not receiving enough oxygen-rich blood.
Fatigue During Activity
Unusual tiredness and reduced exercise tolerance may be signs of impaired coronary blood flow.
Abnormal Stress Test Results
Patients with positive or inconclusive stress test findings may benefit from FFR or iFR assessment for a more accurate diagnosis.
Recurrent Cardiac Symptoms
Individuals who continue to experience symptoms despite medical treatment may require further evaluation of coronary artery function.
Multiple Coronary Artery Blockages
FFR and iFR help identify which blockages are actually affecting blood flow and require intervention.
Risks and Complications of FFR / iFR
FFR and iFR are generally very safe procedures. However, as with any catheter-based procedure, certain risks may include:
- Minor bleeding at the catheter insertion site
- Blood vessel injury
- Irregular heartbeat
- Allergic reaction to contrast dye
- Temporary chest discomfort
- Rare risk of artery damage
- Rare risk of heart attack or stroke
Our experienced cardiac team follows strict safety measures to minimize complications and ensure patient safety.
How is the FFR / iFR Procedure Performed?
Coronary Angiography
The procedure begins with coronary angiography to identify areas of narrowing within the coronary arteries.
2. Pressure Wire Placement
A specialized pressure-sensing guidewire is advanced across the suspected blockage.
3. Blood Flow Measurement
Pressure measurements are recorded to assess the impact of the blockage on blood flow to the heart muscle.
4. FFR or iFR Analysis
The collected data is analyzed to determine whether the blockage is functionally significant.
5. Treatment Decision
Based on the results, the cardiologist decides whether angioplasty, stenting, or medical management is the most appropriate treatment.
6. Completion of Procedure
The guidewire and catheter are removed, and the patient is monitored before discharge.