Clinical features and outcomes between African American and Caucasian patients with Takotsubo Syndrome

Cardiac rupture as a life-threatening outcome of Takotsubo syndrome: A systematic review

BACKGROUND

Takotsubo syndrome (TS) is a reversible cause of heart failure; however, a minority of patients can develop serious complications, including cardiac rupture (CR).

OBJECTIVES

Analyze case reports of CR related to TS, detailing patient characteristics to uncover risk factors and prognosis for this severe complication.

METHODS

We conducted a systematic search of MEDLINE and Embase databases to identify case reports of patients with TS complicated by CR, from inception to October 2023.

RESULTS

We included 44 subjects (40 females; 4 males) with a median age of 75 (IQR 71-82) years, of White/Caucasian (61%) or East Asian/Japanese (39%) ethnicity. An emotional trigger was present in 15 (34%) subjects and an apical ballooning pattern was observed in all cases (100%). ST-segment elevation was reported in 39 (93%) of 42 cases, with the anterior myocardial segments (37 [88%]) being the most compromised, followed by lateral (26 [62%]) and inferior (14 [33%]) segments. The median time to cardiac rupture was 48 (5-120) hours since admission, with the left ventricular free wall (25 [57%]) being the most frequent site of perforation. Surgery was attempted in 16 (36%) cases, and 28 (64%) patients did not survive.

CONCLUSIONS

CR related to TS is a rare complication associated with high mortality and affecting elderly females, specially from White/Caucasian or East Asian/Japanese descent, presenting with anterior or lateral ST-segment elevation, and an apical ballooning pattern. Although data is limited and additional prospective studies are needed, the awareness of this life-threatening complication is crucial to early identify high-risk patients.

CONDENSED ABSTRACT

Cardiac rupture is a rare complication of Takotsubo syndrome. We conducted a systematic review of cases complicated by cardiac rupture, and we identified 44 subjects (40 females and 4 males) with a median age of 75 (IQR 71-82) years, of White/Caucasian (61%) or East Asian/Japanese (39%) ethnicity, all with an apical ballooning pattern (100%). The median time to cardiac rupture was 48 (5-120) hours since admission, with the left ventricular free wall (25 [57%]) being the most frequent site of perforation. Surgery treatment was attempted in 16 (36%) cases, and 28 (64%) patients did not survive.

Racial Disparities in Clinical Outcomes of Takotsubo Cardiomyopathy: An Analysis of the National Inpatient Sample 2006 to 2018

BACKGROUND

This study aimed to evaluate the impact of race on in-hospital outcomes of Takotsubo cardiomyopathy using the National Inpatient Sample.

METHODS AND RESULTS

We conducted a retrospective study using data from the National Inpatient Sample database 2006 to 2018. We focused on Takotsubo cardiomyopathy hospitalizations, excluding those with acute coronary syndrome as the primary diagnosis. Two study groups consisted of White patients or Black patients. Univariate and multivariable logistic models evaluated race's effect on death, cardiac arrest, cardiogenic shock, length of stay, while adjusting for potential confounders. The Bayesian model averaging technique was used to further elucidate the factors influencing death within each racial group. Significant differences were observed between the 2 racial groups. Black patients presented at a younger age, had a higher proportion of men, a higher burden of comorbidities, and a lower median household income compared with their White counterparts. In the univariate model, the Black cohort showed an increased risk of cardiac arrest (odds ratio, 1.45 [95% CI, 1.15-1.82]). However, the difference did not reach statistical significance in the multivariable model. Black patients also had a significantly longer hospital stay in both the univariate model (risk ratio, 1.26 [95% CI, 1.22-1.31]) and the multivariable model (risk ratio, 1.06 [95% CI, 1.04-1.07]). No significant difference in all-cause death was observed between the racial groups.

CONCLUSIONS

The outcome differences between 2 racial groups in our study are likely influenced by racial disparities in demographics, comorbidities, and socioeconomic factors. Individualized care based on racial group needs is crucial in clinical practice.

Takotsubo Syndrome in Black Americans: Insights From the National Inpatient Sample

BACKGROUND

Data on race-related differences in the clinical outcomes of Takotsubo syndrome are limited, particularly for Black patients. This study aimed to assess whether race and sex may have an additional impact on the inpatient mortality of patients with Takotsubo syndrome.

METHODS

A total of 4,628 patients from the United States' National Inpatient Sample from 2012 to 2016 were identified; propensity score analysis revealed a similar propensity score between Black patients (n = 2,314) and White patients (n = 2,314), which was used to balance observed covariates. Sex and age distributions were identical between the 2 groups. The groups were also similar in baseline characteristics, including cardiovascular risk factors. White patients were compared with Black patients on in-hospital outcomes and inpatient mortality. A logistic regression analysis was conducted to measure the difference in mortality based on race and sex.

RESULTS

Compared with White patients, Black patients had a higher percentage of in-hospital complications, including cerebrovascular accidents (4.9% vs 2.5%, P ≤ .01), acute kidney injury (25% vs 19%, P ≤ .01); longer lengths of stay (8 vs 7 days, P ≤ .01); and higher inpatient mortality (6.1% vs 4.5%, P < .01). When analysis was conducted with race and sex combined, inpatient mortality was higher among Black men than among White women (odds ratio, 2.7 [95% CI, 1.80-3.95]; P ≤ .01).

CONCLUSION

This study showed that Black patients with Takotsubo syndrome have higher in-hospital complications and inpatient mortality rates. When race and sex were combined, inpatient mortality was significantly higher among Black men than among either White men and women or Black women.

QT Prolongation and In-Hospital Ventricular Arrhythmic Complications in Patients With Apical Ballooning Takotsubo Syndrome

BACKGROUND

Takotsubo syndrome is associated with life threatening arrhythmias, and the apical ballooning pattern is characterized by a peculiar QT prolongation and particularly high-risk of arrhythmias.

OBJECTIVES

The aim of the study was to determine the association of QT interval on electrocardiogram for ventricular arrhythmic complications in patients with apical ballooning Takotsubo syndrome in a diverse population at a large urban hospital in the U.S.

METHODS

We reviewed 105 cases of apical ballooning Takotsubo syndrome in patients admitted between 2011 and 2017. Two cardiologists reviewed the electrocardiograms to measure QT interval, adjusted for rate using the Fridericia formula (QT_CF), and ventricular arrhythmic complications during the hospitalization. Data are reported as median and interquartile range or number and percentage.

RESULTS

Of the 105 patients, 86 (82%) were female, and 34 (32%) were self-reported Black or African American. The mean age was 65 years (range: 58-72 years). Left ventricular ejection fraction was 25% (range: 25%-35%). Heart rate was 101 beats/min (range: 83-121 beats/min). Ten (11%) patients experienced a ventricular arrhythmic complication and had significantly longer QT_CF (470 [range: 422-543] milliseconds) than did those without complications (417 [range: 383-456] milliseconds, P = 0.031). The area under the curve for QT_CF was 0.708 (95% CI: 0.536-0.880; P = 0.031). Twenty-eight (27%) patients had a QT_CF ≥460 milliseconds and significantly more arrhythmic complications (21% vs 5%, odds ratio 4.997 [95% CI: 1.288-19.237], P = 0.021). QT_CF was an independent predictor of ventricular arrhythmias: odds ratio 1.090 for each 10-millisecond increase in QT_CF (95% CI: 1.004-1.183; P = 0.040, corrected for sex).

CONCLUSIONS

In a diverse population of patients with apical ballooning Takotsubo syndrome admitted to a large urban hospital in the United States, QT_CF at admission ≥460 milliseconds identifies patients at high risk for in-hospital arrhythmic complications. Further studies are needed to determine strategies aimed at shortening QT interval to potentially prevent life-threatening arrhythmic events.