Impact of Ischemic Post-conditioning

Not Applicable

• Conditions: Ischemic Reperfusion Injury; ST Elevation Myocardial Infarction; Ventricular Remodeling; Ventricular Dysfunction
• Interventions: Procedure: Primary per-cutaneous coronary intervention

• Registration Number: NCT04068116
• Lead Sponsor: Assiut University

Brief Summary

Study will investigate \& compare the left ventricular remodeling \& systolic function between two groups of ST-elevation myocardial infarction undergoing primary per-cutaneous coronary intervention applying ischemic post-conditioning to one of them.

Detailed Description

Among re-perfusion strategies for the management of ST-elevation myocardial infarction , primary per-cutaneous coronary intervention is the preferred one within 120 minutes from the first medical contact.However , restoration of the coronary blood flow can paradoxically reduce the beneficial effects of myocardial re-perfusion , a phenomenon known as myocardial re-perfusion injury.Ischemic post-conditioning has been described as a measure for myocardial salvage , performed by making cycles of briefly interrupted perfusion during the early moments of coronary re-flow.Post-conditioning may be performed immediately after the early re-flow by creating cycles of interrupted inflation \& deflation of the angioplasty balloon in patients undergoing primary per-cutaneous coronary intervention.In this study investigators aim to compare the left ventricular remodeling and global systolic function immediately \& 6 months after re-perfusion between two groups of 100 patients presenting with acute ST-elevation myocardial infarction, using ischemic post-conditioning in one group of patients undergoing primary per-cutaneous coronary intervention (n=50 patients) by making 4 cycles of repeated occlusion \& re-perfusion 30-second each by inflation/deflation of an appropriately sized per-cutaneous trans-luminal coronary angioplasty balloon.The other group will be investigated after re-perfusion by primary per-cutaneous coronary intervention without ischemic post-conditioning (n=50 patients)

Study Timeline

• Study First Submitted: 2019-08-20
• Study First Submitted QC: 2019-08-22
• Study First Posted: 2019-08-28
• Status Verified: 2019-09
• Last Update Submitted: 2019-09-04
• Last Update Posted: 2019-09-06
• Study Start: 2019-10-15
• Primary Completion: 2020-10-15
• Study Completion: 2021-10-15

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

1. Patients presenting with symptoms of acute myocardial ischemia with time of symptom onset < 12 hours & meeting the other following criteria of type 1 myocardial infarction according to the fouth universal definition of myocardial infarction(Thygesen, 2019):

   • Detection of a rise and/or fall of cardiac troponin values with at least one value above the 99th percentile upper reference limit.(URL)
   • Ischemic ECG changes; New or persistent ST-segment elevation with development of pathological Q waves
   • Imaging evidence of new loss of viable myocardium or new regional wall motion abnormality in a pattern consistent with an ischemic etiology.

2. Patients undergoing primary percutaneous coronary intervention as the first choice of revascularization therapy.

Exclusion Criteria

1. Patients with transient ST segment elevation in the surface electrocardiography.
2. Patients presenting within > 12 hours from the onset of maximal symptoms.
3. Patients with evidence of pre-infarction angina.
4. Patients with evidence of collateral blood flow to the infarct region on their angiogram.
5. Patients with history of old myocardial infarction causing chronic impairment of LV systolic function.
6. Patients presenting with ST-segment elevation myocardial infarction other than type 1 according to the fouth universal definition of myocardial infarction

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Postconditioning in primary percutaneous coronary intervention	Primary per-cutaneous coronary intervention	Patients presenting with ST-elevation myocardial infarction will undergo primary per-cutaneous coronary intervention with post-conditioning by making 4 cycles of repeated occlusion \& re-perfusion 30-second each by inflation/deflation of an appropriately sized PTCA (per-cutaneous trans-luminal coronary angioplasty) balloon
Primary percutaneous coronary intervention	Primary per-cutaneous coronary intervention	Patients presenting with ST-elevation myocardial infarction will undergo primary per-cutaneous coronary intervention without post-conditioning

Primary Outcome Measures

Name	Time	Method
Left ventricular remodeling	Immediate-6 months	percentage of increase in left ventricular end-diastolic volume (EDV) and/or left ventricular end-systolic volume (ESV)