Delayed multifocal recurrent stress-induced cardiomyopathy after antidepressants withdrawal

Takotsubo Cardiomyopathy in the Absence of an Identifiable Emotional Stressor

This is a case presentation of a 61-year-old female with a history of long-term asymptomatic left bundle branch block and recurrent nephrolithiasis who presented to the emergency department with chest pain that radiated to the left shoulder and jaw, nausea, vomiting, and generalized weakness. On admission, the electrocardiogram showed prolonged QRS complex, significant T-wave inversions in leads V2-V4, and left bundle branch block. Troponin I serum levels were found to be markedly elevated. The echocardiogram demonstrated left ventricular hypokinesis. The patient was admitted for treatment of non-ST-elevation myocardial infarction and was placed on a heparin drip with daily aspirin and high-intensity statin. Cardiac catheterization showed angiographically normal coronary arteries with no signs of obstruction or stenosis. Upon questioning, the patient did not endorse any recent emotionally or physically triggering incidents. Despite the lack of an identifiable emotional stressor, the patient met the diagnostic criteria for takotsubo cardiomyopathy (TTC) and was subsequently placed on evidence-based medical therapy. While most individuals with TTC will fully recover their cardiac function with proper treatment, a subset of patients may continue to have symptoms of persistent heart failure following their initial diagnosis. The pathophysiology of TTC is still not well understood. While the leading theory describes a catecholamine surge secondary to an emotionally or physically triggering event causing myocardial injury and subsequent temporary cardiac dysfunction, further research must be done to understand the underlying pathophysiology of this condition fully.

Left Ventricular Ballooning Patterns in Recurrent Takotsubo Cardiomyopathy: A Systematic Review and Meta-analysis of Reported Cases

Recurrent takotsubo cardiomyopathy (TTC) and the clinical profiles and outcomes of patients have not been fully evaluated, nor has the effect of left ventricular ballooning pattern. After searching the medical literature for reports of patients with recurrent TTC, we identified 84 articles with 101 case descriptions. We divided the cases into those with only apical left ventricular ballooning patterns at recurrence (typical, n=60), and those with at least one midventricular or basal ballooning pattern (atypical, n=41). We then compared their clinical profiles and outcomes. The groups were similar in terms of baseline demographic characteristics, presence and types of triggers, use of heart failure medications at TTC recurrence, electrocardiographic changes at presentation, initial left ventricular ejection fractions, timespans between recurrent TTC episodes, and recovery times after each event. However, patients in the atypical group had significantly fewer severe adverse events (cardiogenic shock and cardiac arrest) than did those in the typical group, with an estimated 63% lower odds (adjusted odds ratio=0.37; 95% CI, 0.14-0.97; P=0.039). Survival to hospital discharge was statistically similar but lower in the typical group (n=53; 88.3%) than in the atypical group (n=24; 96%). Our results suggest that left ventricular ballooning patterns influence clinical outcomes, and that outcomes are more favorable in patients with recurrent TTC who have atypical left ventricular ballooning patterns.

Takotsubo Cardiomyopathy: Medical and Psychiatric Aspects. Role of Psychotropic Medications in the Treatment of Adults with "Broken Heart" Syndrome

Takotsubo cardiomyopathy (TTC) is reversible stress-induced cardiomyopathy featuring symptoms of acute myocardial infarction without significant coronary artery abnormalities. TTC is frequently precipitated by stressful emotional events but it also has been reported as a result of substance withdrawal, non-cardiac events, and dangerous drug-to-drug interaction. The plasma levels of both epinephrine and norepinephrine were significantly elevated in TTC patients, suggesting that elevated catecholamine levels might be the main contributing factor. However, the mechanisms underlying susceptibility to development and recurrence are not completely understood.

It has been suggested that even a therapeutic dose of antidepressant could be a cause of drug-induced tachycardia and TTC. Moreover, some cases have been reported in which the development of TTC was associated with the serotonin syndrome, neuroleptic malignant syndrome, and similar fatal consequences.

The aim of this article is to explore the association between underlying psychiatric disorders and TTC and to determine the role of various psychotropic medications in the progression of stress-induced cardiomyopathy. This article also notes and discusses the current theories underlying the pathophysiology of TTC. This review suggests a serious side effect of antidepressants, and to avoid life-threatening cardiovascular events, such as TTC, for patients with affective and anxiety disorders, prior screening for cardiovascular conditions by ECG with close monitoring might be necessary.

Pre-existing Psychiatric Illness is Associated With Increased Risk of Recurrent Takotsubo Cardiomyopathy

BACKGROUND

The increased prevalence of psychiatric illness among patients with takotsubo cardiomyopathy (TC) has been previously described.

OBJECTIVES

We sought to assess the effect of pre-existing psychiatric illness on clinical outcomes following the diagnosis of TC.

METHODS

Adults diagnosed with TC at Vanderbilt University Medical Center between 1999 and 2015 were included in the study. Medical records were retrospectively reviewed to identify any pre-existing mood, anxiety, or schizophrenia-spectrum illness before TC presentation. Multivariable logistic regression was used to test for independent association of pre-existing psychiatric illness with 30-day mortality and recurrent TC; Cox proportional hazard analysis was used to evaluate for association with long-term mortality.

RESULTS

Among 306 patients diagnosed with TC during the study period, 114 (37%) had a pre-existing psychiatric illness. In all, 43 (14%) and 88 (29%) patients died within 30 days of index diagnosis and as of last medical record review, respectively. Of the 269 who survived their index hospitalization, 19 (7%) had a confirmed recurrent episode of TC. In multivariable analyses, pre-existing psychiatric illness was not associated with increased 30-day (P = 0.320) or long-term (P = 0.621) mortality. Pre-existing psychiatric illness was associated with higher risk of recurrent TC (odds ratio = 7.44, 95% CI: 2.30-24.01, P < 0.001).

CONCLUSIONS

Pre-existing psychiatric illness was associated with an increased risk of recurrent TC. No significant association was noted between pre-existing psychiatric illness and survival.

Takotsubo Cardiomyopathy and Catatonia in the Setting of Benzodiazepine Withdrawal

We report two serious and unusual complications of benzodiazepine withdrawal in a single patient: takotsubo cardiomyopathy and catatonia. This 61-year-old female patient was brought to the emergency department with lethargy and within hours had declined into a state of catatonia. Although there was never a complaint of chest pain, ECG showed deep anterior T-wave inversions and cardiac enzymes were elevated. An echocardiogram was consistent with takotsubo cardiomyopathy. She later received 1 mg of midazolam and within minutes had resolution of catatonic symptoms. Careful history revealed that she had omitted her daily dose of lorazepam for 3 days prior to admission. To our knowledge, the case presented herein is the first report of simultaneous catatonia and takotsubo cardiomyopathy in the setting of benzodiazepine withdrawal. The pathogenesis of both conditions is poorly understood but may be indirectly related to the sudden decrease in γ-aminobutyric acid (GABA) signaling during benzodiazepine withdrawal.