The prognostic value of quantitative blood flow score (QFR) and the index of microcirculatory resistance (IMR) measured after primary percutaneous coronary intervention for ST-segment elevation myocardial infarction

The prognostic value of quantitative blood flow score (QFR) and the index of microcirculatory resistance (IMR) measured after primary percutaneous coronary intervention for ST-segment elevation myocardial infarction: A multicenter,prospective and observational study

Status

Recruiting

Phases

Early Phase 1

Study type

Observational

Source

ChiCTR

Registry ID

ChiCTR2100045897

Enrollment

Unknown

Registered

2021-04-27

Start date

2019-01-01

Completion date

Unknown

Last updated

2021-12-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

ST-segment elevation myocardial infarction

Interventions

Case series:No

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: 1. Acute ST-segment elevation myocardial infarction 2. The time from onset to primary percutaneous coronary intervention (PPCI)is less than 12 hours; 3. Aged >=18 years; 4. Patients undergoing primary percutaneous coronary intervention (PPCI); 5. residual stenosis < 20% by visual estimation and final TIMI (Thrombolysis In Myocardial Infarction) flow grade 3; 6. Informed consent.

Exclusion criteria

Exclusion criteria: 1. Life expectancy is less than 1 year; 2. clinical or angiographic features limiting QFR computation (left main or ostial right coronary artery, branch lesions,anastomotic lesions, previous coronary artery bypass graft, atrial fibrillation, ongoing ventricular arrhythmias, or significant and persistent tachycardia); 3. There is no culprit artery; 4. Female in child-bearing period; 5. Cardiogenic shock.

Design outcomes

Primary

Measure	Time frame
quantitative blood flow ratio;index of microcirculatory resistance;	—

Secondary

Measure	Time frame
Echocardiogram;Major adverse cardiovascular events;	—

Countries

China

Contacts

Public ContactDong Haojian

Guangdong Provincial People's Hospital

donghaojian@sina.com+86 13711012377

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026