Reverse takotsubo cardiomyopathy: two case reports and review of the literature
© Patankar et al.; licensee BioMed Central Ltd. 2013
Received: 24 June 2012
Accepted: 16 January 2013
Published: 19 March 2013
Reverse takotsubo cardiomyopathy is a rare variant of classic takotsubo cardiomyopathy that presents within a different patient profile and with its own hemodynamic considerations. Its recognition is important for prognostic, evaluation and treatment considerations.
Case 1: A 69-year-old Caucasian woman presented with substernal chest pain following a motor vehicle accident. During her evaluation, she was found to have positive results for cardiac enzymes and underwent left heart cardiac catheterization. The results of the catheterization demonstrated no significant coronary stenosis. However, her ventriculogram showed basal and anterior akinesis.
Case 2: A 62-year-old Caucasian woman began having substernal chest pain that radiated to her shoulder blades. She was taken to a local area hospital where she was found to have elevated troponins. A left heart catheterization showed an ejection fraction of 35% with hypokinesis of the anterior and posterobasal walls of her heart, with 30% stenosis of her left anterior descending artery but no other significant coronary artery stenosis.
The cases in this report illustrate a lesser-known variant of takotsubo cardiomyopathy.
Takotsubo cardiomyopathy is typified by a transient systolic dysfunction of the apical segments of the left ventricle mimicking myocardial infarction in the absence of obstructive coronary artery disease. The pattern is also described as apical ballooning. It accounts for approximately 1.2% of all troponin proven acute coronary syndrome events . Reverse takotsubo, a variant form of takotsubo cardiomyopathy in which the basal and midventricular segments of the left ventricle are akinetic, occurs in a minority of patients . The majority of takotsubo cardiomyopathy patients recover cardiac function within three to six months. We present the case of two patients who had reversible takotsubo cardiomyopathy and offer a review of the literature regarding mechanism of injury, risk profile and clinic presentation.
A 69-year-old Caucasian woman with a past medical history of atrial fibrillation presented to Baylor University Medical Center, Waxahachie, TX, USA after having substernal chest pain following a motor vehicle accident. Her initial electrocardiogram showed atrial fibrillation with a heart rate of 60 to 70 beats per minute with no S-T-wave changes. Her initial level of troponin was 0.85ng/mL and trended up to a peak level of 4.58ng/mL. She was loaded with clopidogrel bisulfate (Plavix®) started on a heparin drip and taken to emergent cardiac catheterization at Baylor University Medical Center, Dallas, TX, USA.
Catheterization showed her to have a depressed left ventricular ejection fraction of 40% with moderate inferior and anterolateral hypokinesis with a 30% mid stenosis of her right coronary artery but otherwise unremarkable coronaries. She was discharged home on metoprolol tartrate (Lopressor®) aspirin and ramipril. Our patient’s subsequent transthoracic echocardiogram demonstrated normal left ventricular systolic function with an estimated ejection fraction of 55%.
The second patient, a 62-year-old Caucasian woman with a history of atrial fibrillation and atrial flutter (status post transseptal ablation in 2005) began having substernal chest pain that radiated to her shoulder blades. No emotional stressors preceded this pain. She was taken to a local area hospital where she was found to have new T-wave inversion in leads V1 and V2 and an initial elevated level of troponins of 6.22ng/mL that later increased to 8.85ng/mL.
Takotsubo cardiomyopathy, also known as broken heart syndrome, is a cardiomyopathy typically seen in the setting of acute medical illness or emotional or physical stress, and is thought to be caused by a catecholamine-mediated injury . The pathologic role of catecholamines has been suggestive, as there have been cases in which endogenous adrenergic stimulation (for example, iatrogenic or via a pheochromocytoma) has resulted in the manifestation of this entity . The exact mechanism of injury caused by catecholamines is less well understood. There are two primary theories - vascular dysfunction and catecholamine-induced toxicity.
Vasospasm is strongly associated with takotsubo cardiomyopathy. Patients undergoing angiography have demonstrated multifocal coronary vasospasm that results in a pattern of apical ballooning . Patients have also had abnormal thrombolysis in myocardial infarction frame counts on angiography in the absence of obstructive coronary disease, suggesting impairment of epicardial coronary circulation due to microcirculatory spasm .
Endomyocardial biopsy data in patients with takotsubo cardiomyopathy suggest that myocyte injury occurs in the presence of excessive catecholamines . Histologic findings from patients with takotsubo cardiomyopathy document myofibrillar degeneration, contraction band necrosis and mononuclear leukocyte infiltration, which are forms of myocyte injury witnessed in catecholamine toxicity . Molecular studies have shown that high doses of epinephrine are directly toxic to the cells, causing a rise in adenosine 3':5'-cyclic monophosphate and calcium levels that then trigger the formation of free oxygen radicals, the initiation of expression of stress response genes, and induction of apoptosis .
Compared with patients who have apical ballooning, patients with reverse takotsubo cardiomyopathy present at a younger age, with a mean age of 36, and often they have an emotional or physical stress trigger [9, 10].
The belief is that catecholamines act on adrenoreceptors that have their highest density within the apex of the heart in postmenopausal women, which explains the occurrence of the apical variant in older women . The presentation of inverted takotsubo cardiomyopathy in younger patients may be due to the abundance of adrenoreceptors at the base of the heart, compared with in the apex in older patients.
Patients with reverse takotsubo cardiomyopathy may present with less pulmonary edema, dyspnea and cardiogenic shock than patients with classic takotsubo cardiomyopathy . This finding suggests that the differences in the clinical features are concomitant with possible hemodynamic changes caused by differences in the location of regional wall motion abnormality.
In classic takotsubo cardiomyopathy, left ventricular outflow tract obstruction from left ventricular basal hyperkinesis can contribute to shock or mitral regurgitation, or pseudo-hypertrophic cardiomyopathy can explain the hemodynamic profile .
Patients with reverse takotsubo cardiomyopathy have been reported to have significantly higher levels of cardiac markers, such as creatine kinase M (muscle type) or B (brain type) and troponin-I, than patients with apical or midventricular takotsubo cardiomyopathy . This could be explained by the extent of myocardium involved in each form, with more myocardial tissue being affected in reverse rather than classic takotsubo cardiomyopathy.
Reverse takotsubo cardiomyopathy is a variant with similar pathophysiological causes as classic takotsubo cardiomyopathy but with a different patient profile and presenting symptoms. This rarer variant of takotsubo cardiomyopathy is important to identify as it tends not to be recognized as readily as the traditional presentation. Because it tends to have the same clinical course, its recognition can aid in the expectation of recovery and prognosis, which can help with regards to treatment plans.
Written informed consent was obtained from the patients for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
- Kurowski V, Kaiser A, von Hof K, Killermann DP, Mayer B, Hartmann F, Schunkert H, Radke PW: Apical and midventricular transient left ventricular dysfunction syndrome (tako-tsubo cardiomyopathy): frequency, mechanisms, and prognosis. Chest. 2007, 132: 809-816. 10.1378/chest.07-0608.View ArticlePubMedGoogle Scholar
- Tsuchihashi K, Ueshima K, Uchida T, Oh-mura N, Kimura K, Owa M, Yoshiyama M, Miyazaki S, Haze K, Ogawa H, Honda T, Hase M, Kai R, Morii I, Angina Pectoris-Myocardial Infarction Investigations in Japan: Transient left ventricular apical ballooning without coronary artery stenosis: a novel heart syndrome mimicking acute myocardial infarction. Angina Pectoris-Myocardial Infarction Investigations in Japan. J Am Coll Cardiol. 2001, 38: 11-18. 10.1016/S0735-1097(01)01316-X.View ArticlePubMedGoogle Scholar
- Takizawa M, Kobayakawa N, Uozumi H, Yonemura S, Kodama T, Fukusima K, Takeuchi H, Kaneko Y, Kaneko T, Fujita K, Honma Y, Aoyagi T: A case of transient left ventricular ballooning with pheochromocytoma, supporting pathogenetic role of catecholamines in stress-induced cardiomyopathy or takotsubo cardiomyopathy. Int J Cardiol. 2007, 114: e15-e17. 10.1016/j.ijcard.2006.07.125.View ArticlePubMedGoogle Scholar
- Nojima Y, Kotani J: Global coronary artery spasm caused takotsubo cardiomyopathy. J Am Coll Cardiol. 2010, 55: e17-10.1016/j.jacc.2009.10.035.View ArticlePubMedGoogle Scholar
- Bybee KA, Prasad A, Barsness GW, Lerman A, Jaffe AS, Murphy JG, Wright RS, Rihal CS: Clinical characteristics and thrombolysis in myocardial infarction frame counts in women with transient left ventricular apical ballooning syndrome. Am J Cardiol. 2004, 94: 343-346. 10.1016/j.amjcard.2004.04.030.View ArticlePubMedGoogle Scholar
- Ako J, Sudhir K, Farouque HM, Honda Y, Fitzgerald PJ: Transient left ventricular dysfunction under severe stress: brain-heart relationship revisited. Am J Med. 2006, 119: 10-17. 10.1016/j.amjmed.2005.08.022.View ArticlePubMedGoogle Scholar
- Nfor T, Kostopoulos L, Hashim H, Jan MF, Gupta A, Bajwa T, Allaqaband S: Identifying false-positive ST-elevation myocardial infarction in emergency department patients. J Emerg Med. 2012, 43: 561-567. 10.1016/j.jemermed.2011.09.027.View ArticlePubMedGoogle Scholar
- Lyon AR, Rees PS, Prasad S, Poole-Wilson PA, Harding SE: Stress (Takotsubo) cardiomyopathy–a novel pathophysiological hypothesis to explain catecholamine-induced acute myocardial stunning. Nat Clin Pract Cardiovasc Med. 2008, 5: 22-29. 10.1038/ncpcardio1066.View ArticlePubMedGoogle Scholar
- Ramaraj R, Movahed MR: Reverse or inverted takotsubo cardiomyopathy (reverse left ventricular apical ballooning syndrome) presents at a younger age compared with the mid or apical variant and is always associated with triggering stress. Congest Heart Fail. 2010, 16: 284-286. 10.1111/j.1751-7133.2010.00188.x.View ArticlePubMedGoogle Scholar
- Song BG, Chun WJ, Park YH, Kang GH, Oh J, Lee SC, Park SW, Oh JK: The clinical characteristics, laboratory parameters, electrocardiographic, and echocardiographic findings of reverse or inverted takotsubo cardiomyopathy: comparison with mid or apical variant. Clin Cardiol. 2011, 34: 693-699. 10.1002/clc.20953.View ArticlePubMedGoogle Scholar
- Park JH, Kang SJ, Song JK, Kim HK, Lim CM, Kang DH, Koh Y: Left ventricular apical ballooning due to severe physical stress in patients admitted to the medical ICU. Chest. 2005, 128: 296-302. 10.1378/chest.128.1.296.View ArticlePubMedGoogle Scholar
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