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Serial assessment of the index of microcirculatory resistance during primary percutaneous coronary intervention comparing manual aspiration catheter thrombectomy with balloon angioplasty (IMPACT study)

Serial assessment of the index of microcirculatory resistance during primary percutaneous coronary intervention comparing manual aspiration catheter thrombectomy with balloon angioplasty (IMPACT study): a randomized controlled pilot study

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN31767278
Enrollment
40
Registered
2014-07-28
Start date
2010-06-01
Completion date
Unknown
Last updated
2021-07-12

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

Conditions

Acute myocardial infarction Circulatory System Acute myocardial infarction

Interventions

Participants will be randomised to receive one of the following two treatments: 1. Manual thrombectomy with a thrombus aspiration microcatheter (suction before stenting)

Sponsors

Papworth Hospital NHS Foundation Trust (UK)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Patients with ST segment elevation myocardial infarction (STEMI) or new left bundle branch block (LBBB), <12 hours since symptom onset and with partial restoration of coronary artery flow after passage of a guide wire 2. Age 18-100 years 3. Male or female

Exclusion criteria

Exclusion criteria: 1. Patient unable to consent 2. Cardiogenic shock 3. Unfavourable coronary anatomy 4. Surgical disease 5. Baseline Thrombolysis In Myocardial Infarction (TIMI) flow score = 0 6. Contra-indication to adenosine 7. Heart block 8. Severe airways disease

Design outcomes

Primary

MeasureTime frame
Index of Microcirculatory Resistance (IMR) at the end of the PPCI procedure

Secondary

MeasureTime frame
1. Troponin at 12 and 24 hours 2. Cardiac MRI determined infarct size at day 1 and month 3

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 4, 2026