Outcomes of ST-Segment Elevation Myocardial Infarction Involving the Left Main Coronary Artery

Incidence and predictors of sudden cardiac arrest in the immediate post-percutaneous coronary intervention period for ST-elevation myocardial infarction: a single-center study

BACKGROUND

Data on the incidence, predictors, and outcomes of sudden cardiac arrest (SCA) in the immediate post-percutaneous coronary intervention (PCI) period for ST-elevation myocardial infarction (STEMI) are limited.

OBJECTIVES

The study aimed to investigate the trends and predictors of SCA occurring within 48 h post PCI for STEMI.

METHODS

We systematically reviewed data from the electronic medical records of 403 patients who underwent PCI for STEMI between January 2014 and December 2019. Trends in the incidence of SCA 48 h post PCI for STEMI were assessed using the Cochrane-Armitage test. Multivariable logistic regression was used to determine the predictors of SCA within 48 h post PCI for STEMI.

RESULTS

Of the 403 patients who underwent PCI for STEMI, 44 (11%) had SCA within 48 h post PCI. The incidence of SCA within 48 h post PCI decreased from 22% in 2014 to 8% in 2019; P = 0.03. After adjusting for underlying confounding variables in the multivariable logistic regression models, out of hospital cardiac arrest [adjusted odds ratio (aOR), 23.9; confidence interval (CI), 10.2-56.1], left main coronary artery disease (aOR, 3.1; CI, 1.1-9.4), left main PCI (aOR, 6.6; CI: 1.4-31.7), new-onset heart failure (aOR, 2.0; CI, 4.3-9.4), and cardiogenic shock (aOR, 5.8; CI, 1.7-20.2) were statistically significant predictors of SCA within 48 h post PCI for STEMI.

CONCLUSION

We identified essential factors associated with SCA within 48 h post PCI for STEMI. Future studies are needed to devise effective strategies to decrease the risk of SCA in the early post-PCI period.

Influence of Human Immunodeficiency Virus Infection on the Management and Outcomes of Acute Myocardial Infarction With Cardiogenic Shock

BACKGROUND

There are limited data on the outcomes of acute myocardial infarction-cardiogenic shock (AMI-CS) in patients with HIV infection and AIDS.

SETTING

Twenty percent sample of all US hospitals.

METHODS

A retrospective cohort of AMI-CS during 2000-2017 from the National Inpatient Sample was evaluated for concomitant HIV and AIDS. Outcomes of interest included in-hospital mortality and use of cardiac procedures. A subgroup analysis was performed for those with and without AIDS within the HIV cohort.

RESULTS

A total 557,974 AMI-CS admissions were included, with HIV and AIDS in 1321 (0.2%) and 985 (0.2%), respectively. The HIV cohort was younger (54.1 vs. 69.0 years), more often men, of non-White race, uninsured, from a lower socioeconomic status, and with higher comorbidity (all P < 0.001). The HIV cohort had comparable multiorgan failure (37.8% vs. 39.0%) and cardiac arrest (28.7% vs. 27.4%) (P > 0.05). The cohorts with and without HIV had comparable rates of coronary angiography (70.2% vs. 69.0%; P = 0.37) but less frequent early coronary angiography (hospital day zero) (39.1% vs. 42.5%; P < 0.001). The cohort with HIV had higher unadjusted but comparable adjusted in-hospital mortality compared with those without [26.9% vs. 37.4%; adjusted odds ratio 1.04 (95% confidence interval: 0.90 to 1.21); P = 0.61]. In the HIV cohort, AIDS was associated with higher in-hospital mortality [28.8% vs. 21.1%; adjusted odds ratio 4.12 (95% confidence interval: 1.89 to 9.00); P < 0.001].

CONCLUSIONS

The cohort with HIV had comparable rates of cardiac procedures and in-hospital mortality; however, those with AIDS had higher in-hospital mortality.

Management of ST-Elevation Myocardial Infarction in High-Risk Settings

Despite the widespread adoption of primary percutaneous intervention and modern antithrombotic therapy, ST-segment elevation myocardial infarction (STEMI) remains the leading cause of death in the United States and remains one of the most important causes of morbidity and mortality worldwide. Certain high-risk patients present a challenge for diagnosis and treatment. The widespread adoption of primary percutaneous intervention in addition to modern antithrombotic therapy has resulted in substantial improvement in the short- and long-term prognosis following STEMI. In this review, we aim to provide a brief analysis of the state-of-the-art treatment for patients presenting with STEMI, focusing on cardiogenic shock, current treatment and controversies, cardiac arrest, and diagnosis and treatment of mechanical complications, as well as multivessel and left main-related STEMI.

Temporal Trends and Outcomes of Left Ventricular Aneurysm After Acute Myocardial Infarction

There are limited data on the prevalence and an outcome of left ventricular (LV) aneurysms following acute myocardial infarction (AMI). Using the National Inpatient Sample during 2000 to 2017, a retrospective cohort of AMI admissions was evaluated for LV aneurysms. Complications included ventricular arrhythmias, mechanical, cardiac arrest, pump failure, LV thrombus, and stroke. Outcomes of interest included in-hospital mortality, temporal trends, complications, hospitalization costs, and length of stay. A total 11,622,528 AMI admissions, with 17,626 (0.2%) having LV aneurysms were included. The LV aneurysm cohort was more often female, with higher comorbidity, and admitted to large urban hospitals (all p < 0.001). In 2017, compared with 2000, there was a slight increase in LV aneurysms prevalence in those with (adjusted odds ratio [aOR] 1.57 [95% confidence interval {CI} 1.41 to 1.76]) and without (aOR 1.13 [95% CI 1.00 to .127]) ST-segment-elevation AMI (p < 0.001 for trend). LV aneurysms were more commonly noted with anterior ST-segment-elevation AMI (31%) compared with inferior (12.3%) and other (7.9%). Ventricular arrhythmias (17.6% vs 8.0%), mechanical complications (2.6% vs 0.2%), cardiac arrest (7.1% vs 5.0%), pump failure (26.3% vs 16.1%), cardiogenic shock (10.0% vs 4.8%) were more common in the LV aneurysm cohort (all p < 0.001). Those with LV aneurysms had comparable in-hospital mortality compared with those without (7.4% vs 6.2%; aOR 1.02 [95% CI 0.90 to 1.14]; p = 0.43). The LV aneurysm cohort had longer length of hospital stay, higher hospitalization costs, and fewer discharges to home. In conclusion, LV aneurysms were associated with higher morbidity, more frequent complications, and greater in-hospital resource utilization, without any differences in in-hospital mortality in AMI.

Influence of seasons on the management and outcomes acute myocardial infarction: An 18-year US study

Background

There are limited data on the seasonal variation in acute myocardial infarction (AMI) in the contemporary literature.

Hypothesis

There would be decrease in the seasonal variation in the management and outcomes of AMI.

Methods

Adult (>18 years) AMI admissions were identified using the National Inpatient Sample (2000‐2017). Seasons were classified as spring, summer, fall, and winter. Outcomes of interest included prevalence, in‐hospital mortality, use of coronary angiography, and percutaneous coronary intervention (PCI). Subgroup analyses for type of AMI and patient characteristics were performed.

Results

Of the 10 880 856 AMI admissions, 24.3%, 22.9%, 22.2%, and 24.2% were admitted in spring, summer, fall, and winter, respectively. The four cohorts had comparable age, sex, race, and comorbidities distribution. Rates of coronary angiography and PCI were slightly but significantly lower in winter (62.6% and 40.7%) in comparison to the other seasons (64‐65% and 42‐43%, respectively) (P < .001). Compared to spring, winter admissions had higher in‐hospital mortality (adjusted odds ratio [aOR]: 1.07; 95% confidence interval [CI]: 1.06‐1.08), whereas summer (aOR 0.97; 95% CI 0.96‐0.98) and fall (aOR 0.98; 95% CI 0.97‐0.99) had slightly lower in‐hospital mortality (P < .001). ST‐segment elevation (10.0% vs 9.1%; aOR 1.07; 95% CI 1.06‐1.08) and non‐ST‐segment elevation (4.7% vs 4.2%; aOR 1.07; 95% CI 1.06‐1.09) AMI admissions in winter had higher in‐hospital mortality compared to spring (P < .001). The primary results were consistent when stratified by age, sex, race, geographic region, and admission year.

Conclusions

Compared to other seasons, winter admission was associated with higher in‐hospital mortality in AMI in the United States.

Cardiogenic shock and cardiac arrest complicating ST-segment elevation myocardial infarction in the United States, 2000-2017

BACKGROUND

There are limited data on the outcomes of cardiogenic shock (CS) and cardiac arrest (CA) complicating ST-segment-elevation myocardial infarction (STEMI).

METHODS

Adult (>18 years) STEMI admissions were identified using the National Inpatient Sample (2000-2017) and classified as CS + CA, CS only, CA only and no CS/CA. Outcomes of interest included temporal trends, in-hospital mortality, hospitalization costs, use of do-not-resuscitate (DNR) status and palliative care referrals across the four cohorts.

RESULTS

Of the 4,320,117 STEMI admissions, CS, CA and both were noted in 5.8%, 6.2% and 2.7%, respectively. In 2017, compared to 2000, there was an increase in CA (adjusted odds ratio [aOR] 1.83 [95% confidence interval {CI} 1.79-1.86]), CS (aOR 3.92 [95% CI 3.84-4.01]) and both (aOR 4.09 [95% CI 3.94-4.24]) (all p < 0.001). The CS+CA (77.2%) cohort had higher rates of multiorgan failure than CS only (59.7%) and CA only (26.3%), p < 0.001. The CA only cohort had lower rates (64%) of coronary angiography compared to the other groups (>70%), p < 0.001. In-hospital mortality was higher in CS+CA compared to CS alone (adjusted OR 1.87 [95% CI 1.83-1.91]), CA alone (adjusted OR 1.99 [95% CI 1.95-2.03]) or neither (aOR 18.37 [95% CI 18.02-18.71]). The CS+CA cohort had higher use of palliative care and DNR status. The presence of CS, either alone or in combination with CA, was associated with higher hospitalization costs.

CONCLUSIONS

The combination of CS and CA was associated with higher rates of non-cardiac organ failure and in-hospital mortality in STEMI compared to those with either CS or CA alone.