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[Primary coronary angioplasty for acute myocardial infarction associated with severe left ventricular dysfunction.
D Antoniucci1, G M Santoro, L Bolognese
1Divisione di Cardiologia, Ospedale di Careggi, Firenze.
Insights
Primary angioplasty is effective for acute myocardial infarction with severe left ventricular dysfunction, showing high reperfusion rates and low mortality. This treatment offers a promising option for improving patient outcomes in critical cardiac events.
Area of Science:
- Cardiology
- Interventional Cardiology
- Acute Myocardial Infarction Management
Background:
- Controversy exists regarding the therapeutic value of primary percutaneous coronary intervention (PCI) for acute myocardial infarction (AMI).
- Existing data suggest primary PCI may benefit AMI patients with cardiogenic shock.
- Some studies indicate no benefit of routine primary PCI in high-risk AMI patients with severe left ventricular dysfunction.
Purpose of the Study:
- To evaluate the efficacy and safety of primary coronary angioplasty in patients with acute myocardial infarction and severe left ventricular dysfunction.
- To assess reperfusion rates, in-hospital mortality, and long-term ischemic events following primary PCI in this high-risk population.
Main Methods:
- A prospective study of 50 patients with AMI and left ventricular ejection fraction >= 40% within 6 hours of symptom onset or longer with ongoing ischemia.
- Primary coronary angioplasty was performed, with success defined by <30% stenosis and TIMI grade 3 flow.
- Coronary stenting was utilized in some cases; repeated angioplasty or bypass surgery was performed as needed for revascularization or complications.
Main Results:
- Optimal angiographic success (90%) was achieved in 45 patients; suboptimal results in 6%, and failure in 4%.
- In-hospital mortality was 6%.
- During follow-up (171 days), mortality was 4% (due to heart failure), with 4% experiencing nonfatal reinfarction or recurrent ischemia requiring repeat PCI.
Conclusions:
- Primary coronary angioplasty demonstrates a high reperfusion rate in patients with AMI and severe left ventricular dysfunction.
- The procedure is associated with relatively low in-hospital mortality and a low incidence of recurrent ischemic events.
- Primary PCI can be considered a first-choice treatment option for selected AMI patients with severe left ventricular dysfunction.
Background:
Considerable controversy exists about the therapeutic value of primary coronary angioplasty for acute myocardial infarction. The available data suggest that primary angioplasty may improve the outcome in patients with cardiogenic shock, while some clinical studies have found no benefit in routine angioplasty in patients with acute myocardial infarction that were considered at high risk because of severe left ventricular dysfunction associated with myocardial infarction.
Methods And Results:
During a 16-month period, 50 patients with acute myocardial infarction and severe left ventricular dysfunction underwent primary coronary angioplasty. Patients were enrolled if angiographic left ventricular ejection fraction was > or = 40% and symptom duration <6 hours, or >6 hours if there was evidence of ongoing ischemia. Optimal angiographic success (<30% stenosis associated with TIMI grade 3 flow) was achieved in 45 patients (90%), and a suboptimal result (>30% and <50% stenosis associated with TIMI grade 3 flow, or <30% stenosis associated with TIMI grade 2 flow) was achieved in 3 patients (6%), while in 2 patients angioplasty failed to reopen the infarct related vessel or was associated with a refractory no-reflow phenomenon. In 5 patients an optimal angiographic result was achieved after coronary stenting. Emergency repeated coronary angioplasty was required in 1 patient with reocclusion of a stented vessel, and after unsuccessful repeated coronary angioplasty, the patient underwent bypass surgery on a semi-elective basis. In 6 patients with multivessel disease, after successful primary angioplasty of the infarct-related vessel, a more complete revasculariziation was achieved with a second coronary angioplasty or bypass surgery before discharge. The in-hospital mortality rate was 6%. The follow-up of 47 patients surviving initial hospitalization was 171 +/- 163 days. There were 2 deaths (4%), both due to congestive heart failure, and 1 nonfatal reinfarction. Two patients (4%), were readmitted to the hospital for recurrent ischemia and both underwent successful repeated coronary angioplasty for restenosis.
Conclusions:
The results of this study suggest that in patients with acute myocardial infarction associated with severe left ventricular dysfunction, primary coronary angioplasty may be considered a first choice treatment because of high reperfusion rate, relative low in-hospital mortality and few recurrent myocardial ischemic events.