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Shah AH, Oechslin E, Benson L, Crean AM, Silversides C, Bach Y, Wald RM, Roche SL, Osten M, Bruaene AVD, Colman J, Goraya B, Abrahamyan L, Hanneman K, Nguyen E, Horlick E. Long-Term Outcomes of Unrepaired Isolated Partial Anomalous Pulmonary Venous Connection With an Intact Atrial Septum. Am J Cardiol 2023; 201:232-238. [PMID: 37392606 DOI: 10.1016/j.amjcard.2023.05.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/12/2023] [Accepted: 05/29/2023] [Indexed: 07/03/2023]
Abstract
The natural history of an unrepaired isolated partial anomalous pulmonary venous connection(s) (PAPVC) and the absence of other congenital anomalies remains unclear. This study aimed to expand the understanding of the clinical outcomes in this population. Isolated PAPVC with an intact atrial septum is a relatively uncommon condition. There is the perception that patients with isolated PAPVC are usually asymptomatic, that the lesion generally has a limited hemodynamic impact, and that surgical repair is rarely justified. For this retrospective study, we reviewed our institutional database to identify patients with either 1 or 2 anomalous pulmonary veins that drain a portion of but not the complete ipsilateral lung. Patients with previous surgical cardiac repair, coexistence of other congenital cardiac anomalies that would result in either pretricuspid or post-tricuspid loading of the right ventricle (RV), or scimitar syndrome were excluded. We reviewed their clinical course over the follow-up period. We identified 53 patients; 41 with a single and 12 with 2 anomalous PAPVC. A total of 30 patients (57%) were men, with a mean age at the latest clinic visit of 47 ± 19 years (18 to 84 years). Turner syndrome (6 of 53, 11.3%), bicuspid aortic valve (6 of 53, 11.3%), and coarctation of the aorta (5 of 53, 9.4%) were commonly associated anomalies. A single anomalous left upper lobe vein was the most commonly identified variation. More than half of the patients were asymptomatic. Cardiopulmonary exercise test demonstrated a maximal oxygen consumption of 73 ± 20% expected (36 to 120). Transthoracic echocardiography demonstrated a mean RV basal diameter of 4.4 ± 0.8 cm, RV systolic pressure of 38 ± 13 (16 to 84) mm Hg. A total of 8 patients (14.8%) had ≥moderate tricuspid regurgitation. Cardiac magnetic resonance in 42 patients demonstrated a mean RV end-diastolic volume index of 122 ±3 0 ml/m2 (66 to 188 ml/m2), of which in 8 (14.8%), it was >150 ml/m2. Magnetic resonance imaging-based Qp:Qs was 1.6 ± 0.3. A total of 5 patients (9.3%) had established pulmonary hypertension (mean pulmonary artery pressure ≥25 mm Hg). In conclusion, isolated single or dual anomalous pulmonary venous connection is not necessarily a benign congenital anomaly because a proportion of patients develop pulmonary hypertension and/or RV dilation. Regular follow-up and on-going patient surveillance with cardiac imaging is advised.
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Affiliation(s)
- Ashish H Shah
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network; St Boniface Hospital, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Erwin Oechslin
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Lee Benson
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network; The Labatt family Heart Center, The Hospital for Sick Children, Division of Cardiology, The University of Toronto School of Medicine
| | - Andrew M Crean
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Candice Silversides
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Yvonne Bach
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Rachel M Wald
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network; The Labatt family Heart Center, The Hospital for Sick Children, Division of Cardiology, The University of Toronto School of Medicine
| | - S Lucy Roche
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network; The Labatt family Heart Center, The Hospital for Sick Children, Division of Cardiology, The University of Toronto School of Medicine
| | - Mark Osten
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Alexander Van De Bruaene
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network; Adult Congenital Heart Disease, University Hospitals Leuven, Leuven, Belgium
| | - Jack Colman
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Burhan Goraya
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Lusine Abrahamyan
- Toronto General Hospital Research Institute, University Health Network; Institute of Health Policy Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
| | - Kate Hanneman
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Elsie Nguyen
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network
| | - Eric Horlick
- Peter Munk Cardiac Center and Toronto Congenital Cardiac Center for Adults, Toronto General Hospital, University Health Network.
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Abstract
Improved technology in artificial heart development and implantation studies in unanesthetized calves have stimulated a new model for cardiovascular research. Independent control of the left and right ventricles, replacement of the natural right atrium with an artificial atrium (with a compliant inner diaphragm) are illustrated as examples of new methods to study the cardiovascular system. Preliminary results in three calves suggest that synchronous ventricular pumping is not required for total circulatory maintenance. In four calves a passive artificial right atrium was shown to decrease outflow obstruction to the right ventricle. A compliant inner deiapragm demonstrated a reduction in the amplitude of the atrial C and V waves. The effects of volume and drug infusion on peripheral vascular response in the presence of controlled artificial heart pumping (which does not respond to direct neural or hormonal influences) further illustrate the efficacy of this preparation as a new model for cardiovascular research.
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