MICRO: a Registry Study in Patients With Microvascular Angina

Summary

The evidence above demonstrates that microvascular dysfunction is an important determinant of patient prognosis, which however remains poorly classified. Given the high burden of disease and the severity of the functional impairment in these patients, the lack of a clear definition for this disease has a potentially large clinical importance. It is important to better describe the phenotype of these patients, identify the predictors of prognosis, and determine the impact of diagnosis.

Eligibility

Inclusion Criteria:

* Age ≥ 18 and \<85 years.
* Chronic coronary syndrome (including patients with anginal equivalents)
* Angina CCS class II-IV
* Evidence of reversible ischemia on non-invasive testing
* Availability of the following measurements:

  1. Index of microvascular resistances (IMR),
  2. Resting full-cycle ratio (RFR),
  3. Fractional flow reserve (FFR),
  4. Coronary flow reserve (CFR)
* Willingness to participate and ability to understand read and signed the informed consent document before the procedure

Exclusion Criteria:

At least one of the following:

* Pregnancy and or lactation.
* Medical or psychological conditions that would jeopardize an adequate and orderly participation.
* Left ventricular ejection fraction lower than 30%
* Previous coronary artery bypass surgery (CABG) to all major branches in the LAD and left circumflex (LCX) territory, such that IMR cannot be measured
* Decompensated congestive heart failure (CHF)
* Chronic or acute renal failure with creatinine \>2mg/dl
* Severe valvular heart disease
* Patients with comorbidities limiting life expectancy to less than one year

Conditions2

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