Case report: new onset heart failure in congenitally corrected transposition of the great arteries, dextrocardia, and situs inversus in an octogenarian
- 400 Downloads
Congenitally corrected transposition of the great arteries (ccTGA) is a rare anomaly comprising a minimal portion of congenital heart disease cases. Some patients are not identified until adulthood. A minority of these patients maintain normal functional status into the seventh decade and generally only when no other anomalies exist. We describe a case of ccTGA, dextrocardia, and situs inversus in the oldest patient diagnosed with these congenital abnormalities to date.
An 83 year old female with known dextrocardia presented with dyspnea and was diagnosed with ccTGA, situs inversus, and new onset heart failure.
The factors that lead to a delayed presentation of systemic right ventricular failure in ccTGA remain ill-defined. Common adult acquired secondary causes of heart failure, such as hypertension and coronary artery disease, likely play a role in patients with congenital heart disease. Aggressive screening and management of these co-existing diseases may improve overall outcomes in adult patients with congenital heart disease.
KeywordsCongenitally corrected transposition Dextrocardia Systemic ventricular failure
Beats per minute
Breaths per minute
Congenitally corrected transposition of the great arteries
Millimeters of mercury
Right ventricular hypertrophy
Congenitally corrected transposition of the great arteries (ccTGA) is a rare complex congenital heart disease characterized by atrioventricular and ventriculo-arterial discordance. Dextrocardia, along with other intra-cardiac defects, are common findings in this population [1, 2, 3]. Situs inversus, identified by inverted atria, occur less frequently in these patients, representing only 34% [4, 5]. If no associated intra-cardic abnormalities coexist with ccTGA, these patients may go undiagnosed until adulthood . Generally by the fourth decade, systemic right ventricle (RV) dysfunction is clinically apparent . We present the case of a patient with known dextrocardia who was diagnosed with ccTGA and systemic RV dysfunction at 83-years-old. This case, with the constellation of ccTGA, dextrocardia, and situs inversus, represents the oldest patient diagnosed with these congenital abnormalities to date.
The patient was started on heart failure therapy with furosemide 20 mg intravenous twice daily, Lisinopril 5 mg daily, and carvedilol 3.125 mg twice daily. After therapy, the patient improved and was discharged home. She was closely followed in the cardiology clinic over the next 10 months where heart failure medical therapy was optimized. The patient’s medication list included Lisinopril 40 mg daily, furosemide 20 mg daily, carvedilol 12.5 mg twice daily, and spironolactone 25 mg daily. The patient presented 1 year later to the hospital with complaints of increasing dyspnea, lower extremity edema, and orthopnea. On this admission, vitals included blood pressure 177/96 mmHg, heart rate 100 bpm, respiration 22 breaths/min, and oxygen saturation of 92% on 2 l of oxygen via nasal cannula. Pro-BNP was elevated at 5276 pg/ml. A repeat echocardiogram demonstrated a decrease in systemic RV function to an EF of 20–25%. Tricuspid regurgitation was worse and pulmonary artery systolic pressure rose to 52 mmHg. Intravenous diuretic therapy was initiated with furosemide 40 mg twice daily. While hospitalized, the patient developed atrial fibrillation with rapid ventricular response, which was treated with apixaban 2.5 mg twice daily and up titration of rate-controlling medications with an increase in carvedilol to 25 mg twice daily. Following diuresis, with associated improvement of symptoms, the patient was released from the hospital. The patient is currently closely monitored in the heart failure clinic.
In modern practice, the majority of cases of ccTGA are diagnosed antenatally via fetal ultrasound. If ccTGA is not recognized antenatally and there are not significant associated cardiac defects, ccTGA patients are likely to remain asymptomatic until the fourth or fifth decade . After the fifth decade, the incidence of congestive heart failure and systemic RV dysfunction increases despite the lack of associated abnormalities. The development of RV dysfunction and tricuspid insufficiency are associated with higher mortality in these patients . The exact mechanisms resulting in eventual RV dysfunction are still a subject of debate with a variety of physiologic and anatomic factors believed to be pathogenetically responsible. These mechanisms can include, but are not limited to, insufficient coronary artery blood flow, progressive tricuspid regurgitation, long term exposure of the RV to increased afterload, arrhythmias, conduction abnormalities, and eventual right ventricular hypertrophy (RVH) [1, 2, 5, 7, 8, 9]. How these factors contribute to the timeline of development of RV dysfunction, allowing some patients to continue to be asymptomatic until the eighth or ninth decades, like our patient, is unclear.
The adaptive capability of the systemic RV to increased afterload may play a role in delay of symptoms. At the molecular level, maladaptive RVH displays greater impairment of angiogenesis, adrenergic signaling, and glucose metabolism than adaptive RVH. Although determinants of the adaptive response, and its timeline, of a given RV to increased afterload, including fetal gene switching among others, are not well defined, candidate genes and transcription factors have already been described . The capacity of the systemic RV in our patient to favorably respond to increasing systemic pressures since birth may have possibly been related to an adaptive RVH response as a phenotypic expression of a protective genetic profile.
In addition to eventual systemic RV dysfunction, all ccTGA patients have some degree of conduction system abnormalities resulting from the unusual location of the AV node and unique path of the His bundle [1, 2]. The abnormal positioning of the conduction system increases the risk for fibrosis of the conduction system with a progressive incidence of complete atrioventricular (AV) block of roughly 2% per year . The rates of complete AV block appear to vary between patients with ccTGA situs solitus compared to those with situs inversus. In one cohort study, there was a decreased incidence of non-surgical complete AV block in the situs inversus group compared to patients with situs solitus . It was theorized that the associated malalignment of the atrial and ventricular septum associated with situs solitus leads to increased susceptibility to atrioventricular block . The decreased likelihood of heart block in ccTGA with situs inversus may contribute to improved long term survival, as in our case.
Life expectancy in patients with ccTGA is known to be reduced compared to normal individuals [1, 2]. As a result, not much data exist regarding the role common adult acquired secondary causes of systemic ventricular failure, such as hypertensive heart disease, diabetes mellitus, or coronary artery disease, may play in systemic RV failure in ccTGA. Only a handful of published cases described acute coronary syndrome (ACS) in ccTGA patients who were diagnosed with varying degrees of coronary artery disease [12, 13, 14]. The degree to which coronary artery disease may contribute to systemic RV dysfunction and long-term outcomes has yet to be established in the aging population with ccTGA.
As stated previously, the incidence of systemic RV dysfunction increases with age leading to signs and symptoms of congestive heart failure . Unfortunately, data from clinical trials aimed at guiding clinicians on how to medically manage heart failure in congenital heart disease are lacking. A few small trials of patients with a systemic RV have demonstrated a decrease in heart failure biomarkers with the use of agents targeting the renin-angiotensin-aldosterone system without a clear impact on morbidity and mortality [15, 16, 17]. Currently, in symptomatic patients with systemic RV dysfunction medical therapies for congestive heart failure from the systemic LV heart failure guidelines are applied with caution . Larger scale trials of medical therapy for congestive heart failure in the congenital heart disease population will become increasingly imperative as the number of aging patients with congenital heart disease continues to grow.
This case represents the oldest reported patient to date with dextrocardia and newly diagnosed congenitally corrected transposition of the great arteries with situs inversus. A variety of factors may have contributed to delayed onset of heart failure until the ninth decade. However, determinants of successful adaptation of the RV to systemic afterload including the interaction with acquired heart diseases in this elderly population of ccTGA remain elusive. Understanding these factors may shed light on the RV potential to favorably adjust to increasing afterload in a variety of congenital as well as acquired conditions associated with pulmonary hypertension. Finally, by earlier screening and diagnosis of ccTGA, the adult cardiologist can potentially help preserve the systemic RV function through careful monitoring of tricuspid valve function with early intervention as needed, and by meticulous surveillance and aggressive treatment of acquired adult cardiac diseases to improve the survival and quality of life of this vulnerable patient population.
Availability of data and materials
Data sharing not applicable to this article.
All authors helped to draft the manuscript and approved the final manuscript.
The authors have none to declare.
Ethics approval and consent to participate
Consent for publication
The patient’s legal guardian gave consent to publish this case report.
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
- 1.Warnes CA. Transposition of the great arteries. Circulation. 2006; https://doi.org/10.1161/CIRCULATIONAHA.105.592352.
- 2.English C. Flack and Thomas P. Graham (2012). Congenitally Corrected Transposition of the Great Arteries, Congenital Heart Disease - Selected Aspects, Prof. P. Syamasundar Rao (Ed.), ISBN: 978–953–307-472-6, InTech, Available from: https://www.intechopen.com/books/congenital-heart-disease-selected-aspects/congenitally-corrected-transposition-of-the-great-arteries. Accessed: 1 Aug 2017.
- 3.Hornung TS, Calder L. Congenitally corrected transposition of the great arteries. Heart. 2010; https://doi.org/10.1136/hrt.2008.150532.
- 4.Biliciler-Denkatas G, Feldt RH, Connolly HM, Weaver AL, Puga FJ, Danielson GK. Early and late results of operations for defects associated with corrected transposition and other anomalies with atrioventricular discordance in a pediatric population. J Thorac Cardiovasc Surg. 2001;122:234–41.CrossRefGoogle Scholar
- 5.Oliver JM, Gallego P, Gonzalez AE, Sanchez-Recalde A, Brett M, Polo L, Gutierrez-Larraya F. Comparison of outcomes of adults with congenitally corrected transposition with situs inversus vs situs solitus. Am J Cardiol. 2012; https://doi.org/10.1016/j.amjcard.2012.07.039.
- 7.Presbitero P, Somerville J, Rabajoli F, Stone S, Conte MR. Corrected transposition of the great arteries without associated defects in adult patients: clinical profile and follow up. Br Heart J. 1995; https://doi.org/10.1136/hrt.74.1.57.
- 9.Tan JLT, Prat D, Gatzoulis MA, Gibson S, Henein MY, Li W. The right ventricular response to high afterload: comparison between atrial switch procedure, congenitally corrected transposition of the great arteries, and idiopathic pulmonary arterial hypertension. Am Heart J. 2007; https://doi.org/10.1016/j.ahj.2006.12.027.
- 12.Ozturk O, Ozturk U, Nergiz S, Karahan MZ. Primary PCI in a patient with congenitally corrected transposition of the great arteries. Int J Cardiovasc Acad. 2016; https://doi.org/10.1016/j.ijac.2016.04.004.
- 13.Ozturk S, Erdem F, Ozturk S, Ayhan S. Successful thrombolytic therapy in a patient with congenital corrected transposition of the great arteries. Acta Med Acad. 2016. https://doi.org/10.5644/ama2006-124.172.
- 14.Lampropoulos, KM, D Kotsas, TA Iliopoulos. Acute coronary syndrome in congenitally corrected transposition of the great arteries. BMJ Case Reports. Published online 2013. doi: https://doi.org/10.1136/bcr-2012-008354.
- 15.Budts W, Roos-Hesselink J, Radle-Hurst T, Eicken A, McDonagh TA, et al. Treatment of heart failure in adult congenital heart disease: a position paper of the working group of grown-up congenital heart disease and the heart failure association of the European Society of Cardiology. Eur Heart J. 2016;37:1419–27. https://doi.org/10.1093/eurheartj/ehv741.CrossRefPubMedPubMedCentralGoogle Scholar
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.