Intracoronary Physiology – FFR, iFR, RFR 

Intracoronary Imaging – Intravascular Ultrasound (IVUS) / Optimal Coherence  Tomography (OCT).

Intracoronary physiology refers to the study of the functional status of coronary arteries within the heart. This is important for the diagnosis and management of coronary artery disease, which is a leading cause of death worldwide. 

Pill Box

There are three key intracoronary physiologic measures that are commonly used to assess the functional status of coronary arteries: FRR, RFR, iFR interventional cardiology.

* Fractional Flow Reserve (FFR). * Instantaneous Wave-Free Ratio (iFR). * Resting Flow Reserve (RFR).

Pie Chart

The diagnosis of intracoronary physiology involves the measurement of Fractional Flow Reserve (FFR), Instantaneous Wave-Free Ratio (iFR), and Resting Flow Reserve (RFR) in patients with suspected or known coronary artery disease. 


The diagnosis of intracoronary physiology is used to determine the functional significance of stenoses (narrowings) in the coronary arteries, which can cause reduced blood flow to the heart and contribute to the development of chest pain (angina) or heart attacks. 

* Improved diagnostic accuracy. * Better patient outcomes. * Reduced exposure to radiation. * Cost-effectiveness.


* Bleeding or infection at the site of access after the FFR cardiology procedure. * Allergic reactions to contrast dyes or medications. * Rare but serious complications such as cardiac arrhythmias or  heart attack.


* Diagnostic coronary angiography. * Pressure and flow measurement devices. * Cardiac catheterization laboratories.


Dr.Kathiresan will discuss the potential benefits and risks of the procedures relating to FFR, iFR, and RFR in cardiology with the patient and provide informed consent. 

Our Doctors 

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