Prognosis Between ST-Elevation and Non-ST-elevation Myocardial Infarction in Older Adult Patients

The association between myocardial early systolic lengthening and high risk angiographic territory involvement in patients with non-ST-segment elevation myocardial infarction

BACKGROUND

Non-ST-segment elevation myocardial infarction (NSTEMI) is more common than ST-segment elevation myocardial infarction (STEMI), consisting of 60-70% of myocardial infarctions. When left ventricular (LV) pressure increases during early systole, regionally ischaemic myocardium with a reduced active force exhibit stretching. The aim of this study was to evaluate the role of this parameter in determining high risk angiographic territory involvement in NSTEMI patients.

RESULTS

This study was a descriptive correlational research that was conducted on 96 patients with NSTEMI and a left ventricular ejection fraction ≥ 50% who underwent coronary angiography (CAG). Patients were divided into two groups based on having or not having high risk angiographic territory involvement in CAG. All patients underwent a transthoracic echocardiography during the first day of hospitalization and early systolic lengthening (ESL), duration of ESL (DESL), left ventricular global longitudinal strain (LVGLS), pulsed-wave Doppler-derived transmitral early (E wave) and late (A wave) diastolic velocities, and tissue-Doppler-derived mitral annular early diastolic (e') and peak systolic (s') velocities were determined. The results of this study showed DESL, DESLLAD, and DESLLCX were longer in high risk angiographic territory group than other one (P value 0.016, 0.044, and 0.04, respectively). The logistic regression analysis showed among different variables, only age and ESLLAD had an independent association with high risk angiographic territory involvement (P = 0.01, odds ratio [OR] 1.09, 95% CI 1.021-1.164, and P = 0.024, odds ratio [OR] 1.243, 95% CI 1.029-1.50, respectively).

CONCLUSIONS

Assessment of myocardial ESLLAD by speckle-tracking echocardiography may be helpful in predicting high risk angiographic territory involvement in patients with NSTEMI. Indeed, a higher value can be considered as a high risk parameter which may show benefit of an early invasive strategy versus a conservative approach.

Predictors of major adverse cardiac and cerebrovascular events after percutaneous coronary intervention in older adults: a systematic review and meta-analysis

AIM

We systematically reviewed and meta-analyzed the predictors of major adverse cardiac and cerebrovascular events (MACE/MACCE) in older adults who underwent PCI.

METHODS

Three databases, PubMed, Embase, and Scopus, were searched for observational studies considering the out-of-hospital MACE/MACCE in adults ≥ 60 years old with coronary artery disease (acute or chronic) who underwent PCI. Studies were eligible if they had determined at least two statistically significant predictors of MACE/MACCE by multivariable analysis. We used the QUIPS tool to evaluate the risk of bias in the studies. Random-effects meta-analysis was utilized to pool the hazard ratios (HRs) of the most reported predictors.

RESULTS

A total of 34 studies were included in the review. Older age (HR = 1.04, 95% Confidence Interval (CI): 1.03-1.06, P-value < 0.001), diabetes (HR = 1.36, 95% CI: 1.22-1.53, P < 0.001), history of myocardial infarction (MI) (HR = 1.88, 95% CI: 1.37-2.57, P < 0.001), ST-elevation MI (STEMI) at presentation (HR = 1.72, 95% CI: 1.37-2.18, P < 0.001), reduced left ventricular ejection fraction (LVEF) (HR = 2.01, 95% CI: 1.52-2.65, P < 0.001), successful PCI (HR = 0.35, 95% CI: 0.27-0.47, P < 0.001), eGFR (HR = 0.99, 95% CI: 0.97-1.00; P-value = 0.04) and left main coronary artery (LMCA) disease (HR = 2.07, 95% CI: 1.52-2.84, P < 0.001) were identified as predictors of MACE.

CONCLUSION

We identified older age, diabetes, history of MI, STEMI presentation, lower LVEF, and LMCA disease increased the risk of MACE/MACCE after PCI in older adults. Meanwhile, higher eGFR and successful PCI predicted lower adverse events risk. Future studies should focus on a more robust methodology and a precise definition of MACE.

REGISTRATION

PROSPERO (CRD42023480332).

Early versus late delayed percutaneous coronary intervention in elderly patients with ST-segment elevation myocardial infarction

BACKGROUND AND OBJECTIVE

There are a substantial proportion of elderly patients with ST-segment elevation myocardial infarction (STEMI) miss the optimal time window (12 h from symptom onset) of primary percutaneous coronary intervention (PCI). For these patients, the ideal timing of delayed PCI remains undetermined. Therefore, this study compared the clinical outcomes of early versus late delayed PCI in elderly patients with STEMI.

METHODS

From January 2014 to September 2019, 512 patients aged ≥ 65 years with STEMI who underwent delayed PCI after 12 h from symptom onset were included and then categorized into the early PCI group (12-48 h, n = 111) and late PCI group (48 h-28 days, n = 401) according to the timing of delayed PCI. Propensity score matching (PSM) was conducted to adjust the confounding factors between groups. The primary endpoint was major adverse cardiac and cerebrovascular events (MACCE), a composite of all-cause death, cardiac death, recurrent myocardial infarction (MI), stroke, and ischemia-driven revascularization.

RESULTS

During a mean follow-up of 77 months, 163 (31.8%) patients developed MACCE and 93 (18.2%) died. Early or late delayed PCI did not make a significant difference in clinical outcomes of MACCE (Before PSM: HR 0.773, 95% CI 0.520-1.149, P = 0.203; After PSM: HR 0.869, 95% CI 0.498-1.517, P = 0.622), all-cause death, cardiac death, recurrent MI, stroke, and ischemia-driven revascularization in both overall patients and the PSM cohorts.

CONCLUSION

Early delayed PCI (12-48 h from symptom onset), for elderly patients with STEMI who present > 12 h after symptom onset is not associated with better long-term clinical outcomes compared with late delayed PCI (48 h-28 days).

Predicting new onset atrial fibrillation post acute myocardial infarction: Echocardiographic assessment of left atrial size

BACKGROUND

Atrial fibrillation (AF) commonly occurs following acute myocardial infarction (AMI). Left atrial (LA) size has been reported to predict new onset AF in this cohort, however, the optimal metric of left atrial size for risk stratification following AMI is unknown.

METHODS

Patients presenting to a tertiary hospital with incident AMI (NSTEMI or STEMI) and no history of AF were recruited. All patients underwent guideline-based workup and management for AMI, including transthoracic echocardiographic assessment. Three alternative metrics of left atrial size were determined: LA area, maximal and minimal LA volume indexed to body surface area (LAVImax and LAVImin). The primary endpoint was new onset AF diagnoses.

RESULTS

Four hundred thirty three patients were included in the analysis, of which 7.1% had a new diagnosis of AF within a median follow-up of 3.8 years. Univariate predictors of incident AF included age, hypertension, revascularization with CABG, NSTEMI presentation, right atrial area, and all three metrics of LA size. Among three multivariable models created for the prediction of new onset AF utilizing alternate metrics of LA size, LAVImin was the only LA size metric found to be an independent predictor.

CONCLUSIONS

LAVImin is an independent predictor of new onset AF post AMI. LAVImin outperforms echocardiographic assessment of diastolic dysfunction and alternative metrics of LA size (including LA area and LAVImax) for risk stratification. Further studies are needed to validate our findings in post AMI patients, and evaluate whether LAVImin holds similar advantages over LAVImax in other cohorts.

Staged revascularization vs. culprit-only percutaneous coronary intervention for multivessel disease in elderly patients with ST-segment elevation myocardial infarction

Backgroundand objective

Studies have highlighted the significant role of staged percutaneous coronary intervention (PCI) for a multivessel disease (MVD) among patients with ST-elevation myocardial infarction (STEMI). However, the relative benefit of staged vs. culprit-only PCI for MVD in elderly patients with STEMI remains undetermined. Thus, the present study compared the clinical outcomes of staged and culprit-only PCI in this cohort.

Methods

From January 2014 to September 2019, 617 patients aged ≥65 years with STEMI and MVD who underwent primary PCI of the culprit vessels within 12 h of symptom onset were enrolled. They were then categorized into the staged and culprit-only PCI groups according to intervention strategy. Propensity score matching (PSM) was conducted to adjust for confounding factors between groups. The primary end point was major adverse cardiac and cerebrovascular events (MACCE), a composite of all-cause death, cardiac death, recurrent myocardial infarction (MI), stroke, and ischemia-driven revascularization.

Results

During a mean follow-up of 56 months, 209 patients experienced MACCE and 119 died. Staged revascularization was associated with a lower risk of MACCE, all-cause death, and cardiac death than culprit-only PCI in both overall patients and the PSM cohorts. In contrast, there was no significant difference in stroke or ischemia-driven revascularization. Moreover, on multivariate Cox regression analysis, staged PCI was a significant predictor of a lower incidence of MACCE and all-cause death.

Conclusion

In elderly patients with STEMI and MVD, staged PCI is superior to culprit-only PCI.