Clinical trials: Index of Microvascular Resistance
ST-segment Elevation Myocardial Infarction (STEMI)
Angio-IMR and Cardiac MR-derived MVO in STEMI Patients
Coronary microcirculatory dysfunction has been known to be prevalent even after successful revascularization of ST-segment elevation myocardial infarction (STEMI) patients.
- Trial name
- NCT04828681
- Testing
- Cardiac magnetic resonance imaging
- Where
- 2 sites in United States, China
- Volunteers
- 324 people
- Sponsor
- Samsung Medical Center
ST Elevation Myocardial Infarction
Effect of DLBS1033 After Primary PCI in Patients With STE-ACS
This is a prospective, randomized, double-blind, double-dummy, and controlled clinical study over a total of 4-week therapy with DLBS1033 in the management of STE-ACS after a primary PCI.
- Trial name
- NCT02976701
- Testing
- DLBS1033, Standard therapy
- Where
- Indonesia
- Volunteers
- 23 people
- Sponsor
- Dexa Medica Group
Cardiomyopathies, Microcirculation
IMR Assessment in Patients With New Diagnosis of Left Ventricle Dilatation
To establish if, in patients with new diagnosis of left ventricular dilatation without documentation at the coronary artery angiography of significant coronary artery lesions, there is a damage of the coronary microcirculation at…
- Conditions
- Cardiomyopathies, Microcirculation, Microvessels
- Trial name
- IMPAIRED (NCT02705170)
- Testing
- index of microvascular resistance
- Where
- Italy
- Volunteers
- 35 people
- Sponsor
- University Hospital of Ferrara
Stable Angina, Coronary Artery Disease
Impact of Rotational Atherectomy on Coronary Microcirculation
The purpose of this observational study is to compare the impact of rotational atherectomy to conventional stenting and to investigate how it may affect coronary microcirculation in patients with calcified coronary artery lesions…
- Trial name
- MICRO-ROTA (NCT05771961)
- Testing
- coronary pressure/temperature sensor-tipped guidewire, Angiography-derived index of microcirculatory resistance (IMRangio)
- Where
- Lithuania
- Volunteers
- 300 people
- Sponsor
- Lithuanian University of Health Sciences
Coronary Microvascular Dysfunction (CMD), Index of Microvascular Resistance
SHR Predicts CMD in Patients with CCS
SHR exerts a significant influence in numerous cardiovascular diseases, including MINOCA (myocardial infarction with non - obstructive coronary arteries), HFpEF (heart failure with preserved ejection fraction), and CAD (coronary…
- Conditions
- Coronary Microvascular Dysfunction (CMD), Index of Microvascular Resistance, Chronic Coronary Syndrome, Prognosis
- Trial name
- SHR-CMD-CCS (NCT06698432)
- Testing
- caIMR
- Volunteers
- 379 people
- Sponsor
- Ya-Wei Xu
Cardiac Allograft Vasculopathy
Early Post Transplant Cardiac Allograft Vasculopathy
Heart transplantation is an effective life-saving treatment for patients with end-stage heart disease. After a transplant, the new heart may develop narrowing in the arteries, causing heart failure, heart attacks and abnormal…
- Trial name
- ECAV (NCT03217786)
- Where
- Canada
- Volunteers
- 80 people
- Sponsor
- Ottawa Heart Institute Research Corporation
Coronary Microvascular Dysfunction (CMD), Stable Angina Pectoris
A Multi-center, Real-World Clinical Trial of caIMR on Two Specific Kinds of Patients.
The coronary angiography-derived index of microcirculatory resistance (caIMR) can be used to provide a binary assessment whether patients（with stable angina, unstable angina, suspected myocardial ischemia, or coronary artery…
- Conditions
- Coronary Microvascular Dysfunction (CMD), Stable Angina Pectoris, Unstable Angina Pectoris, Myocardial Ischemia, Angina Pectoris
- Trial name
- FlashV (NCT06945094)
- Testing
- caIMR
- Volunteers
- 508 people
- Sponsor
- Ge Junbo
Coronary Heart Disease
Ticagrelor Versus Clopidogrel for CMD in Patients With AMI: A Retrospective Study Based on the Angio-IMR
Coronary microvascular dysfunction (CMD) is increasingly recognized as an important indicator for long-term prognosis in patients with acute myocardial infarction (AMI).
- Trial name
- NCT05978726
- Testing
- Dual antiplatelet therapy with aspirin and either ticagrelor or clopidogrel
- Where
- China
- Volunteers
- 325 people
- Sponsor
- Second Affiliated Hospital, Zhejiang University, School of Medicine
Coronary Artery Disease, Microvascular Angina
Coronary Thermo-dilution Derived Flow-indices in Chronic Coronary Syndrome
Patients scheduled for elective coronary angiography due to chronic coronary syndrome are recruited at admission to hospital before the coronary anatomy is known.
- Conditions
- Coronary Artery Disease, Microvascular Angina, Coronary Microvascular Dysfunction
- Trial name
- NCT06306066
- Where
- Sweden
- Volunteers
- 505 people
- Sponsor
- Karolinska Institutet
Coronary Microvascular Dysfunction, Myocardial Ischemia
Diagnostic and Prognostic Value of Angiography-derived IMR
The importance of the microvasculature in determining clinical outcomes has been highlighted in patients with coronary artery disease (CAD).
- Trial name
- CHART-MiCro (NCT04825028)
- Testing
- Angiography-drived Index of Microcirculatory Resistance
- Where
- China
- Volunteers
- 271 people
- Sponsor
- Shanghai Zhongshan Hospital
Coronary Artery Disease, Coronary Microvascular Dysfunction
Multimodal Epicardial and Endocardial COronary PHYsiological Evaluation in Pathological Situations (PHYCO)
When performing coronary angiography in a stable situation, the identification of an intermediate coronary lesion (between 50 and 70%) is common, and requires additional functional evaluation.
- Trial name
- PHYCO (NCT06008041)
- Where
- France
- Volunteers
- 400 people
- Sponsor
- University Hospital, Brest
Hypertrophic Cardiomyopathy
Evaluating Microvascular Dysfunction in Symptomatic Patients With HypertroPhic CaRdiomyopathy
Patients with hypertrophic cardiomyopathy are being compared to a control group. IMR will be assessed with a pressure wire. Clinical f/u at 3 months and 6 months and a 48 hour holter monitor.
- Trial name
- PRIMARy (NCT02994615)
- Where
- Canada
- Volunteers
- 19 people
- Sponsor
- London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's
Heart Failure With Preserved Ejection Fraction, Coronary Microvascular Dysfunction
Distribution and Clinical Implication of CMD in Patients With HFpEF Without Significant CAD
To evaluate the incidence of coronary microvascular dysfunction (CMD) and its' prognostic implication in patients who have diagnosed as heart failure with preserved ejection fraction (HFpEF) confirmed by HFA-PEFF scoring system…
- Trial name
- HFpEF-CMD (NCT04788576)
- Testing
- Invasive physiologic evaluation (fractional flow reserve, coronary flow reserve, index of microcirculatory resistance)
- Where
- South Korea
- Volunteers
- 100 people
- Sponsor
- Samsung Medical Center
Coronary Microvascular Disease, Coronary Artery Disease
Multicenter Registry of Coronary Flow-Derived Indexes for Coronary Microvascular Disease (Multicenter FLOW-CMD Registry)
Multicenter FLOW-CMD registry is a prospective, multi-center, registry study. The aim of the study is to evaluate prognostic implications of coronary microvascular disease (CMD) in patients with ischemic heart disease (IHD)…
- Conditions
- Coronary Microvascular Disease, Coronary Artery Disease, Ischemic Heart Disease
- Trial name
- NCT05369182
- Testing
- Invasive physiologic assessment, Intravascular imaging
- Where
- 7 sites in South Korea
- Volunteers
- 1,003 people
- Sponsor
- Samsung Medical Center
Microvascular Obstruction (MVO), Multivessel Coronary Artery Disease
For Patients With Myocardial Infarction and Multiple Vessel: Testing if Ultrasound (UFR) Can Guide All Needed Treatment in One Procedure, Avoiding a Return Hospital Visit for a Second Operation.
Brief Summary The Purpose of the Study : The purpose of this study is to find a safe and reliable "one-stop" solution for treating heart attack patients who have multiple blocked arteries.
- Conditions
- Microvascular Obstruction (MVO), Multivessel Coronary Artery Disease, ACS (Acute Coronary Syndrome), ST Elevation Myocardial Infarction (STEMI)
- Trial name
- ACT-EVOLVE (NCT07264881)
- Testing
- IVUS-based Fractional Flow Reserve (UFR), Invasive Coronary Physiology Measurement (FFR/RFR/IMR), Cardiac Magnetic Resonance (CMR)
- Where
- China
- Volunteers
- 200 people
- Sponsor
- Beijing Anzhen Hospital
Coronary Artery Calcification, Intravascular Lithotripsy
Prognostic Impact of Coronary Microvascular Dysfunction After IVL Versus RA in Patients With Severe Coronary Calcification Undergoing PCI
The goal of this observational study is to lean that whether the distinct mechanisms by which intravascular lithotripsy (IVL) and rotational atherectomy (RA) treat severe coronary calcification differentially affect the…
- Conditions
- Coronary Artery Calcification, Intravascular Lithotripsy, Coronary Microcirculation Dysfunction
- Trial name
- NCT07699965
- Where
- China
- Volunteers
- 590 people
- Sponsor
- Second Affiliated Hospital, Zhejiang University, School of Medicine
STEMI - ST Elevation Myocardial Infarction, Microvascular Coronary Artery Disease
Impact of TMAO Serum Levels on Hyperemic IMR in STEMI Patients
Trimethylamine N-oxide (TMAO) is a gut microbiota-dependent metabolite of dietary choline, L-carnitine, and phosphatidylcholine-rich foods.
- Trial name
- TAMIR (NCT05406297)
- Testing
- pressure-temperature sensor guidewire-based measurement
- Where
- Lithuania
- Volunteers
- 400 people
- Sponsor
- Lithuanian University of Health Sciences
Acute Coronary Syndrome (ACS), High On-treatment Platelet Reactivity (HTPR)
The Effect of IV Cangrelor and Oral Ticagrelor Study
Major heart attacks are caused by a number of factors, the two major of which are furring up of a coronary artery with atheroma and then sudden clot formation on this area leading to a blockage and interruption of blood flow.
- Conditions
- Acute Coronary Syndrome (ACS), High On-treatment Platelet Reactivity (HTPR), Microvascular Obstruction (MVO), ST-segment Elevation Myocardial Infarction (STEMI)
- Trial name
- NCT02733341
- Testing
- Cangrelor, Ticagrelor
- Where
- United Kingdom
- Volunteers
- 100 people
- Sponsor
- The Royal Wolverhampton Hospitals NHS Trust
Non-ST Segment Elevation Myocardial Infarction, ST Segment Elevation Myocardial Infarction
Comparison of Clopidogrel and Ticagrelor on Microvascular Dysfunction in ST-Segment Elevation Myocardial Infarction
Ticagrelor is a non-thienophyridine, direct P2Y12 blocker that is more potent than clopidogrel and is associated with less interindividual variability.
- Trial name
- NCT02026219
- Testing
- Clopidogrel, Ticagrelor
- Where
- South Korea
- Volunteers
- 76 people
- Sponsor
- Inha University Hospital
Coronary Artery Disease, STEMI - ST Elevation Myocardial Infarction
AccuIMR Predicts Microvascular Obstruction and Infarct Size in STEMI Patients
In this study, we aimed to investigate the clinical significance of the angiography-based IMR calculation method (AccuIMR) and its prognostic assessment capability by evaluating the concordance or discordance between AccuIMR…
- Conditions
- Coronary Artery Disease, STEMI - ST Elevation Myocardial Infarction, Microvascular Coronary Artery Disease
- Trial name
- NCT06947564
- Testing
- CMR
- Where
- China
- Volunteers
- 843 people
- Sponsor
- RenJi Hospital