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Pachon-M JC, Pachon-M EI, Pachon CTC, Santillana-P TG, Lobo TJ, Pachon-M JC, Higuti C, Zerpa-A JC, Pachon MZC, Ortencio FA, Osorio TG, Peixoto LA. Long-term outcomes of cardioneuroablation with and without extra-cardiac vagal stimulation confirmation in severe cardioinhibitory neurocardiogenic syncope. J Cardiovasc Electrophysiol 2024; 35:641-650. [PMID: 38240356 DOI: 10.1111/jce.16188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/27/2023] [Accepted: 01/06/2024] [Indexed: 04/10/2024]
Abstract
BACKGROUND Cardioneuroablation (CNA) is a novel therapeutic approach for functional bradyarrhythmias, specifically neurocardiogenic syncope or atrial fibrillation, achieved through endocardial radiofrequency catheter ablation of vagal innervation, obviating the need for pacemaker implantation. Originating in the nineties, the first series of CNA procedures was published in 2005. Extra-cardiac vagal stimulation (ECVS) is employed as a direct method for stepwise denervation control during CNA. OBJECTIVE This study aimed to compare the long-term follow-up outcomes of patients with severe cardioinhibitory syncope undergoing CNA with and without denervation confirmation via ECVS. METHOD A cohort of 48 patients, predominantly female (56.3%), suffering from recurrent syncope (5.1 ± 2.5 episodes annually) that remained unresponsive to clinical and pharmacological interventions, underwent CNA, divided into two groups: ECVS and NoECVS, consisting of 34 and 14 cases, respectively. ECVS procedures were conducted with and without atrial pacing. RESULTS Demographic characteristics, left atrial size, and ejection fraction displayed no statistically significant differences between the groups. Follow-up duration was comparable, with 29.1 ± 15 months for the ECVS group and 31.9 ± 20 months for the NoECVS group (p = .24). Notably, syncope recurrence was significantly lower in the ECVS group (two cases vs. four cases, Log Rank p = .04). Moreover, the Hazard ratio revealed a fivefold higher risk of syncope recurrence in the NoECVS group. CONCLUSION This study demonstrates that concluding CNA with denervation confirmation via ECVS yields a higher success rate and a substantially reduced risk of syncope recurrence compared to procedures without ECVS confirmation.
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Affiliation(s)
- Jose Carlos Pachon-M
- Sao Paulo University, Sao Paulo, Brazil
- Sao Paulo Heart Hospital, Sao Paulo, Brazil
| | - Enrique I Pachon-M
- Sao Paulo University, Sao Paulo, Brazil
- Sao Paulo Heart Hospital, Sao Paulo, Brazil
| | | | | | | | - Juan C Pachon-M
- Sao Paulo University, Sao Paulo, Brazil
- Sao Paulo Heart Hospital, Sao Paulo, Brazil
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Christensen AH, Wyller VB, Nygaard S, Rolid K, Nytrøen K, Gullestad L, Fiane A, Thaulow E, Saul JP, Døhlen G. Factors Associated With Sinoatrial Reinnervation After Heart Transplantation. Transplant Direct 2023; 9:e1553. [PMID: 37928482 PMCID: PMC10624457 DOI: 10.1097/txd.0000000000001553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 09/05/2023] [Accepted: 09/22/2023] [Indexed: 11/07/2023] Open
Abstract
Background Factors associated with sympathetic and parasympathetic sinoatrial reinnervation after heart transplantation (HTx) are inadequately studied. Methods Fifty transplant recipients were examined at 7 to 12 wk (index visit), 6, 12, 24, and 36 mo after HTx. Supine rest heart rate variability in the low-frequency (LF) domain (sympathetic and parasympathetic sinoatrial reinnervation) and the high-frequency (HF) domain (parasympathetic sinoatrial reinnervation) were measured repeatedly and related to selected recipient, donor, and perisurgical characteristics. We primarily aimed to identify index visit factors that affect the sinoatrial reinnervation process. Secondarily, we examined overall associations between indices of reinnervation and repeatedly measured recipient characteristics to generate new hypotheses regarding the consequences of reinnervation. Results LF and HF variability increased time dependently. In multivariate modeling, a pretransplant diagnosis of nonischemic cardiomyopathy (P = 0.038) and higher index visit handgrip strength (P = 0.028) predicted improved LF variability. Recipient age, early episodes of rejection, and duration of extracorporeal circulation were not associated with indices of reinnervation. Study average handgrip strength was positively associated with LF and HF variability (respectively, P = 0.005 and P = 0.029), whereas study average C-reactive protein was negatively associated (respectively, P = 0.015 and P = 0.008). Conclusions Indices of both sympathetic and parasympathetic sinoatrial reinnervation increased with time after HTx. A pretransplant diagnosis of nonischemic cardiomyopathy and higher index visit handgrip strength predicted higher indices of mainly sympathetic reinnervation, whereas age, rejection episodes, and duration of extracorporeal circulation had no association. HTx recipients with higher indices of reinnervation had higher average handgrip strength, suggesting a link between reinnervation and improved frailty. The more reinnervated participants had lower average C-reactive protein, suggesting an inhibitory effect of reinnervation on inflammation, possibly through enhanced function of the inflammatory reflex. These potential effects of reinnervation may affect long-term morbidity in HTx patients and should be scrutinized in future research.
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Affiliation(s)
- Anders H. Christensen
- Department of Pediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Pediatric Research, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Vegard B.B. Wyller
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Pediatrics, Akershus University Hospital, Norway
| | - Sissel Nygaard
- Department of Pediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
- Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Katrine Rolid
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
- KG Jebsen Cardiac Research Center and Center for Heart Failure Research, University of Oslo, Norway
- Center for Heart Failure Research, Oslo University Hospital, Norway
| | - Kari Nytrøen
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Lars Gullestad
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
- KG Jebsen Cardiac Research Center and Center for Heart Failure Research, University of Oslo, Norway
- Center for Heart Failure Research, Oslo University Hospital, Norway
| | - Arnt Fiane
- Faculty of Medicine, University of Oslo, Oslo, Norway
- Department of Cardiothoracic Surgery, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Erik Thaulow
- Department of Pediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
- Faculty of Medicine, University of Oslo, Oslo, Norway
| | - J. Philip Saul
- Department of Pediatrics, West Virginia University, Morgantown, VA
| | - Gaute Døhlen
- Department of Pediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
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LoTemplio S, Bettmann JE, Scott E, Blumenthal E. Do Mental Health Changes in Nature Co-occur with Changes in Heartrate Variability and Executive Functioning? A Systematic Review. Curr Environ Health Rep 2023; 10:278-290. [PMID: 37516682 DOI: 10.1007/s40572-023-00407-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2023] [Indexed: 07/31/2023]
Abstract
PURPOSE OF REVIEW Given the global burden of mental health issues, new solutions are needed to promote mental health. Nature exposure represents a promising option to promote mental health, but the mechanisms are poorly understood. Recent frameworks have argued that changes in mental health in nature are caused by activity changes in the vagus nerve, which connects the heart and the brain, and that these changes also improve executive functioning (EF) abilities. This suggests that changes in mental health symptomology in nature should be accompanied by changes in vagus nerve activity, as well as changes in executive functioning. Yet, little work has systematically examined co-variation of these outcomes in empirical studies. The present manuscript systematically examines whether changes in mental health in nature are accompanied by changes in vagus nerve activity (approximated by heartrate variability) and changes in executive functioning. RECENT FINDINGS There is compelling evidence that spending time in nature can increase heartrate variability, improve mental health, and improve executive functioning. However, despite strong theoretical claims that these three outcomes should be linked after spending time in nature settings, few studies directly examine such co-occurrence. The study systematically examines whether studies that considered both mental health and executive functioning (n = 6) showed co-occurring effects in response to nature exposure. Similarly, the study also considers if studies examining mental health and heartrate variability (n = 6) showed similarly directional effects following nature exposure. This systematic review concludes with discussion about the limited number of studies (n =1) that include all three measures. We find mixed results of co-occurrence with these variables, suggesting that the relationship between these three constructs in nature may be more nuanced than current theory suggests. Perhaps more importantly, our results demonstrate that there is very little existing work linking changes in mental health to changes in EF and vagal tone. We conclude with justification for why it may be beneficial for researchers to include all three metrics as well as guidance on how to do so.
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A Review of Nuclear Imaging in Takotsubo Cardiomyopathy. Life (Basel) 2022; 12:life12101476. [PMID: 36294911 PMCID: PMC9604781 DOI: 10.3390/life12101476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/19/2022] [Accepted: 09/19/2022] [Indexed: 11/30/2022] Open
Abstract
Takotsubo cardiomyopathy or Takotsubo Syndrome (TTS) is a reversible left ventricular dysfunction syndrome that is increasingly being recognized. Recent advances in nuclear imaging have allowed us to study TTS in greater detail. We searched the PubMed and Medline databases and identified 53 publications with 221 patients reporting nuclear imaging findings in TTS. The age of the patients ranged from 17 to 87 years and were predominantly women (88.2%). The TTS variant was apical (typical) in 170 (76.9%), mid-ventricular in 23 (10.4%), and basal (reverse TTS) in 2 (0.9%). Cardiac perfusion was assessed using 99mTc sestamibi (MIBI) SPECT, 99mTc tetrofosmin SPECT, 201Tl SPECT, 82Rb PET, 201Tl SPECT, and 13N ammonia PET. Additional studies used were 123I MIBG SPECT, 123I BMIPP SPECT, 18F FDG PET, 67Ga citrate, and 11C hydroxy-ephedrine. A perfusion defect was seen in 69 (31.2%), and an inverse perfusion–metabolism mismatch (normal or near-normal perfusion with absent myocardial metabolic activity) was seen in 183 (82.8%) patients. Nuclear imaging has a significant role in evaluating, diagnosing, and prognosticating patients with TTS. As nuclear imaging technology evolves, we will surely gain more insights into this fascinating disorder.
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You've Got Some Nerve (after Heart Transplantation). J Heart Lung Transplant 2022; 41:910-913. [DOI: 10.1016/j.healun.2022.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/04/2022] [Accepted: 02/05/2022] [Indexed: 11/21/2022] Open
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Strong evidence for parasympathetic sinoatrial reinnervation after heart transplantation. J Heart Lung Transplant 2021; 41:898-909. [PMID: 34924265 DOI: 10.1016/j.healun.2021.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 10/26/2021] [Accepted: 11/09/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Heart transplantation (HTx) surgically denervates the heart. We examined indices of sinoatrial reinnervation, with emphasis on (1) the occurrence and timing of parasympathetic reinnervation, and (2) the consequences of reinnervation for heart rate (HR) responsiveness and arterial baroreceptor sensitivity. METHODS Fifty HTx recipients were prospectively followed for 36 months after surgery. Hemodynamic variables and heart rate variability were continuously recorded at supine rest, 60 degrees head-up-tilt, during the Valsalva maneuver and during handgrip isometric exercise. RESULTS Suggesting parasympathetic reinnervation: at baseline rest, root of the mean squared differences of successive RR intervals increased from median 3.9(5.9) to 7.1(5.1) ms (p < 0.001); high-frequency power increased from 4.0(12) to 5.7(18.9) ms2 (p = 0.018); and baroreceptor sensitivity increased from 0.04(0.36) to 1.3(2.4) ms/mmHg (p < 0.001). Suggesting sympathetic reinnervation: at baseline rest low-frequency power increased from 0.49(2.5) to 7.5(18.1) ms2 (p < 0.001); and HR responses to sympathetic stimulation during (1) head-up tilt increased from 1.9(4.2) to 9.1(8.2) bpm (p < 0.001), (2) Valsalva increased from 1.6(1.4) to 8.3(10.8) bpm (p < 0.001) and (3) handgrip increased from 0.3(0.6) to 1.9(5.1) bpm (p < 0.001). Signs of sympathetic reinnervation emerged within 6 months, while signs of parasympathetic reinnervation emerged by 24 months. CONCLUSIONS Root of the mean squared differences of successive RR intervals, high-frequency and low-frequency variability, HR responsiveness and arterial baroreflex sensitivity all increased after HTx, suggesting functional parasympathetic and sympathetic sinoatrial reinnervation. Accordingly, the pathological regulatory state present in heart transplant recipients, which is responsible for a host of functional and clinical abnormalities, is being partially offset over time by restored autonomic control of the heart in many heart transplant recipients.
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Abstract
BACKGROUND Heart transplantation (HTx) surgically transects all connections to the heart, including the autonomic nerves. We prospectively examined signs, timing and consequences of early sympathetic and parasympathetic sinoatrial reinnervation, as well as explored indirect evidence of afferent cardiopulmonary reinnervation. METHODS Fifty HTx recipients were assessed at 2.5, 6, and 12 mo after HTx. For comparison, 50 healthy controls were examined once. Continuous, noninvasive recordings of hemodynamic variables and heart rate variability indices were performed at supine rest, 0.2 Hz controlled breathing, 60° head-up-tilt, during the Valsalva maneuver and during handgrip isometric exercise. RESULTS In HTx recipients, supine low-frequency heart rate variability gradually increased; supine high-frequency variability did not change; heart rate variability indices during controlled breathing remained unaltered; heart rate responses during tilt and isometric exercise gradually increased; the tachycardia response during Valsalva maneuver increased, while the bradycardia response remained unchanged; and indices of baroreflex sensitivity improved. Responses remained low compared to healthy controls. A negative correlation between indices of preload and heart rate response during head-up tilt emerged at 12 mo. CONCLUSIONS Results suggest that sympathetic reinnervation of the sinoatrial node starts within 6 mo after HTx and strengthens during the first year. No evidence of early parasympathetic reinnervation was found. Indirect signs of afferent reinnervation of cardiopulmonary low-pressure baroreceptors emerged at 12 mo. Better sympathetic sinoatrial control improved heart rate responsiveness to orthostatic challenge and isometric exercise, as well as heart rate buffering of blood pressure fluctuations.
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Wu MA, Catena E, Castelli A, Rech R, Borghi B, Ottolina D, Fossali T, Cogliati C, Colombo R. Autonomic biomarkers of shock in idiopathic systemic capillary leak syndrome. PLoS One 2021; 16:e0251775. [PMID: 34061871 PMCID: PMC8168872 DOI: 10.1371/journal.pone.0251775] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 05/03/2021] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE The term Idiopathic Systemic Capillary Leak Syndrome (ISCLS) refers to an uncommon condition of severe distributive shock, resulting from an abrupt shift of fluids and proteins from the intravascular to the interstitial compartment. We hypothesise that the autonomic nervous system (ANS) fails in regulating the response to hypovolemia in acute ISCLS and that ANS variables characterise the progression to the recovery. DESIGN Prospective cohort study of patients admitted to ICU for severe ISCLS flares. SETTING Single, referral center in Italy for ISCLS. PATIENTS Analysis of cardiovascular signals recorded during seven severe ISCLS attacks and one prodromal period in five patients. INTERVENTIONS ANS was studied non-invasively by means of heart rate variability (HRV) and blood pressure variability analysis, as an estimation of vagal and sympathetic modulation directed to the heart and vessels. Heart rate and systolic arterial pressure (SAP) variability were also used to assess baroreflex sensitivity. ANS variables were measured during the subsequent phases which characterise ISCLS flares, namely the acute phase, the post-acute phase, and the recovery phase. MEASUREMENTS AND MAIN RESULTS HRV was severely depressed during the acute phase accounting for the loss of ANS modulation during massive capillary extravasation. This phase was characterised by shock and impaired baroreflex control, which allowed SAP to oscillate driven by respiratory activity. Impending shock and transition from shock to a post-acute phase were marked by change of baroreflex spectral variables. The baroreflex control was fully restored during recovery. CONCLUSIONS ANS modulation and baroreflex control are severely impaired during the acute haemodynamic instability which characterises ISCLS crises and their progressive restoration may be a clue of improvement. ANS indices during ISCLS flares might serve as useful biomarkers, able to timely announce the transition from one phase to the subsequent one, thus helping to adapt therapy accordingly.
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Affiliation(s)
- Maddalena Alessandra Wu
- Division of Internal Medicine, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Emanuele Catena
- Division of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Antonio Castelli
- Division of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Roberto Rech
- Division of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Beatrice Borghi
- Division of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Davide Ottolina
- Division of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Tommaso Fossali
- Division of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Chiara Cogliati
- Division of Internal Medicine, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
| | - Riccardo Colombo
- Division of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital–Polo Universitario—University of Milan, Milan, Italy
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Panerai RB, Batterham A, Robinson TG, Haunton VJ. Determinants of cerebral blood flow velocity change during squat-stand maneuvers. Am J Physiol Regul Integr Comp Physiol 2021; 320:R452-R466. [PMID: 33533312 DOI: 10.1152/ajpregu.00291.2020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The large changes in mean arterial blood pressure (MABP) and cerebral blood flow velocity (CBFV) induced by squat-stand maneuvers (SSM) make this approach particularly suited for studying dynamic cerebral autoregulation (CA). However, the role of other systemic determinants of CBFV has not been described and could provide alternative physiological interpretations of SSM results. In 32 healthy subjects (16 female), continuous recordings of MABP (Finometer), bilateral CBFV (transcranial Doppler, MCA), end-tidal CO2 (EtCO2; capnography), and heart rate (HR; electrocardiogram) were performed for 5 min standing at rest, and during 15 SSM at the frequency of 0.05 Hz. A time-domain, multivariate dynamic model estimated the CBFV variance explained by different inputs, corresponding to significant contributions from MABP (P < 0.00001), EtCO2 (P < 0.0001), and HR (P = 0.041). The autoregulation index (ARI; range 0-9) was estimated from the CBFV response to a step change in MABP. At rest, ARI values (typically 5.7) were independent of the number of model inputs, but during SSM, ARI was reduced compared with baseline (P < 0.0001), and the three input model yielded lower values for the right and left MCA (3.4 ± 1.2, 3.1 ± 1.3) when compared with the single-input MABP-CBFV model (4.1 ± 1.1, 3.9 ± 1.0; P < 0.0001). The high coherence of the MABP-CBFV transfer function at 0.05 Hz (typically 0.98) was considerably reduced (around 0.71-0.73; P < 0.0001) when the contribution of CBFV covariates was taken into account. Not taking into consideration other determinants of CBFV, in addition to MABP, could be misleading and introduce biases in physiological and clinical studies.
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Affiliation(s)
- Ronney B Panerai
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom.,National Institute for Health Research Leicester Biomedical Research Centre, University of Leicester, Leicester, United Kingdom
| | - Angus Batterham
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom
| | - Thompson G Robinson
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom.,National Institute for Health Research Leicester Biomedical Research Centre, University of Leicester, Leicester, United Kingdom
| | - Victoria J Haunton
- Department of Cardiovascular Sciences, University of Leicester, Leicester, United Kingdom.,National Institute for Health Research Leicester Biomedical Research Centre, University of Leicester, Leicester, United Kingdom
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Sathnur N, Li JM, Krishnappa D, G Benditt D. Impact of Denervation by Heart Transplantation on Post-operative Atrial Fibrillation Susceptibility. J Atr Fibrillation 2020; 13:2397. [PMID: 33024498 DOI: 10.4022/jafib.2397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 02/13/2020] [Accepted: 03/17/2020] [Indexed: 11/10/2022]
Abstract
Atrial fibrillation is common following cardiac and non-cardiac thoracic surgery and is associated with poorer outcomes, including: increased risk of stroke, hemodynamic instability, prolonged hospital stay, and increased mortality. Current understanding suggests that post-op atrial fibrillation results from the interplay of local and systemic operative inflammation, increased sympathetic activity, perhaps the release of free radical species in the perioperative period, and the patient's underlying cardiac substrate. Cardiac denervation following orthotopic heart transplant (OHT) using modern bicaval techniques presents a unique opportunity to study the relative contribution of the autonomic nervous system to post-op atrial fibrillation susceptibility. Observational studies show a reduced incidence of post-operative atrial fibrillation following orthotopic heart transplant compared to other cardiac and thoracic surgeries. Moreover, comparison of atrial fibrillation rates with double lung transplant recipients suggests that cardiac denervation has a contribution apart from surgical pulmonary vein isolation alone. This report reviews current concepts of the mechanisms of post-op atrial fibrillation with a focus on the role of the autonomic nervous system, the autonomic regulation of the native heart, and evidence regarding the impact of cardiac denervation following OHT.
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Affiliation(s)
- Neeraj Sathnur
- Cardiac Arrhythmia Center, Cardiovascular Division, Department of Medicine
| | - Jian-Ming Li
- Division of Cardiology, VA Medical Center, University of Minnesota, Minneapolis, Minnesota
| | - Darshan Krishnappa
- Cardiac Arrhythmia Center, Cardiovascular Division, Department of Medicine
| | - David G Benditt
- Cardiac Arrhythmia Center, Cardiovascular Division, Department of Medicine
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Rivinius R, Helmschrott M, Rahm AK, Darche FF, Thomas D, Bruckner T, Doesch AO, Katus HA, Ehlermann P. Five-year results of heart rate control with ivabradine or metoprolol succinate in patients after heart transplantation. Clin Res Cardiol 2020; 111:141-153. [PMID: 32572551 PMCID: PMC8816306 DOI: 10.1007/s00392-020-01692-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 06/17/2020] [Indexed: 11/28/2022]
Abstract
Background Cardiac graft denervation causes inadequate sinus tachycardia in patients after heart transplantation (HTX) which is associated with reduced survival. This study investigated the 5-year results of heart rate control with ivabradine or metoprolol succinate in patients after HTX. Methods This registry study analyzed 104 patients receiving either ivabradine (n = 50) or metoprolol succinate (n = 54) within 5 years after HTX. Analysis included patient characteristics, medication, echocardiographic features, cardiac catheterization data, cardiac biomarkers, heart rates, and post-transplant survival including causes of death. Results Demographics and post-transplant medication revealed no significant differences except for ivabradine and metoprolol succinate use. At 5-year follow-up, patients with ivabradine had a significantly lower heart rate (73.3 bpm) compared to baseline (88.6 bpm; P < 0.01) and to metoprolol succinate (80.4 bpm; P < 0.01), a reduced left ventricular mass (154.8 g) compared to baseline (179.5 g; P < 0.01) and to metoprolol succinate (177.3 g; P < 0.01), a lower left ventricular end-diastolic pressure (LVEDP; 12.0 mmHg) compared to baseline (15.5 mmHg; P < 0.01) and to metoprolol succinate (17.1 mmHg; P < 0.01), and a reduced NT-proBNP level (525.4 pg/ml) compared to baseline (3826.3 pg/ml; P < 0.01) and to metoprolol succinate (1038.9 pg/ml; P < 0.01). Five-year post-transplant survival was significantly better in patients with ivabradine (90.0%) versus metoprolol succinate (68.5%; P < 0.01). Conclusion Patients receiving ivabradine showed a superior heart rate reduction and a better left ventricular diastolic function along with an improved 5-year survival after HTX.
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Affiliation(s)
- Rasmus Rivinius
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany. .,Heidelberg Center for Heart Rhythm Disorders (HCR), Heidelberg University Hospital, Heidelberg, Germany. .,German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany.
| | - Matthias Helmschrott
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany
| | - Ann-Kathrin Rahm
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.,Heidelberg Center for Heart Rhythm Disorders (HCR), Heidelberg University Hospital, Heidelberg, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Fabrice F Darche
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.,Heidelberg Center for Heart Rhythm Disorders (HCR), Heidelberg University Hospital, Heidelberg, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Dierk Thomas
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.,Heidelberg Center for Heart Rhythm Disorders (HCR), Heidelberg University Hospital, Heidelberg, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Tom Bruckner
- Institute for Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Andreas O Doesch
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.,Department of Pneumology and Oncology, Asklepios Hospital, Bad Salzungen, Germany
| | - Hugo A Katus
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.,Heidelberg Center for Heart Rhythm Disorders (HCR), Heidelberg University Hospital, Heidelberg, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Philipp Ehlermann
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
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Miyake R, Ohtani K, Hashimoto T, Yada R, Sato T, Shojima Y, Hayashidani S, Higo T, Tsutsui H. Takotsubo syndrome in a heart transplant recipient with poor cardiac sympathetic reinnervation. ESC Heart Fail 2020; 7:1145-1149. [PMID: 32154667 PMCID: PMC7261543 DOI: 10.1002/ehf2.12632] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 01/07/2020] [Accepted: 01/12/2020] [Indexed: 11/06/2022] Open
Abstract
Takotsubo syndrome (TTS), also referred to as stress cardiomyopathy, is characterized by transient left ventricular apical ballooning in the absence of obstructive coronary artery disease. Catecholamine-induced cardiac injury or vasospasm has been implicated in this pathophysiology. We present a case of a 67-year-old man 10 years after heart transplantation diagnosed with TTS. Sympathetic reinnervation could not be detected by iodine-123 meta iodobenzylguanidine uptake, suggesting that TTS can occur in the absence of functional sympathetic nerve systems reconstruction.
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Affiliation(s)
- Ryo Miyake
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Kisho Ohtani
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Toru Hashimoto
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Ryoko Yada
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Tasuku Sato
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Yoko Shojima
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Shunji Hayashidani
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Taiki Higo
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
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13
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Colombo R, Wu MA, Catena E, Perotti A, Fossali T, Cioffi F, Rech R, Castelli A, Cicardi M. The Role of Failing Autonomic Nervous System on Life-Threatening Idiopathic Systemic Capillary Leak Syndrome. Front Med (Lausanne) 2018; 5:111. [PMID: 29732372 PMCID: PMC5919959 DOI: 10.3389/fmed.2018.00111] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 04/04/2018] [Indexed: 11/20/2022] Open
Abstract
Idiopathic systemic capillary leak syndrome (ISCLS) is a rare disease that involves the endothelium and microcirculation, leading to an abrupt shift of fluids and proteins from the intravascular to the interstitial compartment. The consequence of the capillary leakage is a life-threatening hypovolemic shock that can lead to lethal multiple organ dysfunction. The autonomic nervous system (ANS) is central in regulating the cardiovascular response to hypovolemia, but ANS modulation in ISCLS has not yet been investigated. Here, we report ANS activity during acute phase and recovery from a severe ISCLS shock and speculate on the possibility that autonomic mechanisms underlie the pathogenesis of attacks.
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Affiliation(s)
- Riccardo Colombo
- Department of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Maddalena Alessandra Wu
- Department of Biomedical and Clinical Sciences, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Emanuele Catena
- Department of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Andrea Perotti
- Department of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Tommaso Fossali
- Department of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Federico Cioffi
- Department of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Roberto Rech
- Department of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Antonio Castelli
- Department of Anesthesiology and Intensive Care, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
| | - Marco Cicardi
- Department of Biomedical and Clinical Sciences, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital - Polo ospedaliero, University of Milan, Milan, Italy
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14
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Rivinius R, Helmschrott M, Ruhparwar A, Rahm AK, Darche FF, Thomas D, Bruckner T, Ehlermann P, Katus HA, Doesch AO. Control of cardiac chronotropic function in patients after heart transplantation: effects of ivabradine and metoprolol succinate on resting heart rate in the denervated heart. Clin Res Cardiol 2017; 107:138-147. [DOI: 10.1007/s00392-017-1165-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Accepted: 09/19/2017] [Indexed: 01/15/2023]
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15
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Takakura IT, Hoshi RA, Santos MA, Pivatelli FC, Nóbrega JH, Guedes DL, Nogueira VF, Frota TQ, Castelo GC, Godoy MFD. Recurrence Plots: a New Tool for Quantification of Cardiac Autonomic Nervous System Recovery after Transplant. Braz J Cardiovasc Surg 2017; 32:245-252. [PMID: 28977195 PMCID: PMC5613725 DOI: 10.21470/1678-9741-2016-0035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 02/09/2017] [Indexed: 02/06/2023] Open
Abstract
Objective To evaluate a possible evolutionary post-heart transplant return of autonomic
function using quantitative and qualitative information from recurrence
plots. Methods Using electrocardiography, 102 RR tachograms of 45 patients (64.4% male) who
underwent heart transplantation and that were available in the database were
analyzed at different follow-up periods. The RR tachograms were collected
from patients in the supine position for about 20 minutes. A time series
with 1000 RR intervals was analyzed, a recurrence plot was created, and the
following quantitative variables were evaluated: percentage of determinism,
percentage of recurrence, average diagonal length, Shannon entropy, and
sample entropy, as well as the visual qualitative aspect. Results Quantitative and qualitative signs of heart rate variability recovery were
observed after transplantation. Conclusion There is evidence that autonomic innervation of the heart begins to happen
gradually after transplantation. Quantitative and qualitative analyses of
recurrence can be useful tools for monitoring cardiac transplant patients
and detecting the gradual return of heart rate variability.
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Affiliation(s)
- Isabela Thomaz Takakura
- Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, SP, Brazil.,Universidade de Fortaleza (Unifor), Fortaleza, CE, Brazil
| | - Rosangela Akemi Hoshi
- Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, SP, Brazil
| | - Márcio Antonio Santos
- Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, SP, Brazil
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16
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Williams T, Tang X, Gilmore G, Gossett J, Knecht KR. Measures of and changes in heart rate variability in pediatric heart transplant recipients. Pediatr Transplant 2017; 21. [PMID: 28181355 DOI: 10.1111/petr.12894] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/05/2017] [Indexed: 11/29/2022]
Abstract
Heart rate variability is primarily regulated by the autonomic nervous system. Heart transplant recipients undergo surgical denervation of the graft, which results in interruption of autonomic innervation with resultant diminished heart rate variability although some degree of autonomic control may return. This study aimed to characterize heart rate variability in this population. We report a retrospective review of Holter monitor data from transplanted patients between 2005 and 2013. Studies with significant atrial or ventricular arrhythmias were excluded. We evaluated changes over time and compared standard time domain measures to published pediatric normal values. Data were reviewed from 582 monitors in 152 patients. We found that pediatric heart transplant recipients have lower heart rate variability than age-matched controls and higher average heart rate in recipients older than 3 years. There is an increase in measures of variability through the first 3 years post-transplant with plateau after that time. Surgical technique in regard to interruption of the vagus nerve does not affect variability, nor does underlying congenital vs acquired heart disease.
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Affiliation(s)
- T Williams
- Cardiology Section, Department of Pediatrics, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Cardiology, Little Rock, AR, USA
| | - X Tang
- Biostatistics Section, Department of Pediatrics, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - G Gilmore
- Cardiology Section, Department of Pediatrics, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Cardiology, Little Rock, AR, USA
| | - J Gossett
- Biostatistics Section, Department of Pediatrics, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - K R Knecht
- Cardiology Section, Department of Pediatrics, Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Cardiology, Little Rock, AR, USA
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17
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Awad M, Czer LSC, Hou M, Golshani SS, Goltche M, De Robertis M, Kittleson M, Patel J, Azarbal B, Kransdorf E, Esmailian F, Trento A, Kobashigawa JA. Early Denervation and Later Reinnervation of the Heart Following Cardiac Transplantation: A Review. J Am Heart Assoc 2016; 5:JAHA.116.004070. [PMID: 27802930 PMCID: PMC5210323 DOI: 10.1161/jaha.116.004070] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Morcos Awad
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Lawrence S C Czer
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Margaret Hou
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Sarah S Golshani
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Michael Goltche
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | | | - Michelle Kittleson
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Jignesh Patel
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Babak Azarbal
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Evan Kransdorf
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Fardad Esmailian
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Alfredo Trento
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Jon A Kobashigawa
- Cedars-Sinai Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA
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18
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Métrich M, Mehmeti F, Feliciano H, Martin D, Regamey J, Tozzi P, Meyer P, Hullin R. Adrenergic Receptor Polymorphism and Maximal Exercise Capacity after Orthotopic Heart Transplantation. PLoS One 2016; 11:e0163475. [PMID: 27669015 PMCID: PMC5036840 DOI: 10.1371/journal.pone.0163475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 09/10/2016] [Indexed: 11/18/2022] Open
Abstract
Background Maximal exercise capacity after heart transplantion (HTx) is reduced to the 50–70% level of healthy controls when assessed by cardiopulmonary exercise testing (CPET) despite of normal left ventricular function of the donor heart. This study investigates the role of donor heart β1 and β2- adrenergic receptor (AR) polymorphisms for maximal exercise capacity after orthotopic HTx. Methods CPET measured peak VO2 as outcome parameter for maximal exercise in HTx recipients ≥9 months and ≤4 years post-transplant (n = 41; mean peak VO2: 57±15% of predicted value). Donor hearts were genotyped for polymorphisms of the β1-AR (Ser49Gly, Arg389Gly) and the β2-AR (Arg16Gly, Gln27Glu). Circumferential shortening of the left ventricle was measured using magnetic resonance based CSPAMM tagging. Results Peak VO2 was higher in donor hearts expressing the β1-Ser49Ser alleles when compared with β1-Gly49 carriers (60±15% vs. 47±10% of the predicted value; p = 0.015), and by trend in cardiac allografts with the β1-AR Gly389Gly vs. β1-Arg389 (61±15% vs. 54±14%, p = 0.093). Peak VO2 was highest for the haplotype Ser49Ser-Gly389, and decreased progressively for Ser49Ser-Arg389Arg > 49Gly-389Gly > 49Gly-Arg389Arg (adjusted R2 = 0.56, p = 0.003). Peak VO2 was not different for the tested β2-AR polymorphisms. Independent predictors of peak VO2 (adjusted R2 = 0.55) were β1-AR Ser49Gly SNP (p = 0.005), heart rate increase (p = 0.016), and peak systolic blood pressure (p = 0.031). Left ventricular (LV) motion kinetics as measured by cardiac MRI CSPAMM tagging at rest was not different between carriers and non-carriers of the β1-AR Gly49allele. Conclusion Similar LV cardiac motion kinetics at rest in donor hearts carrying either β1-AR Gly49 or β1-Ser49Ser variant suggests exercise-induced desensitization and down-regulation of the β1-AR Gly49 variant as relevant pathomechanism for reduced peak VO2 in β1-AR Gly49 carriers.
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Affiliation(s)
- Mélanie Métrich
- Cardiology, Cardiovascular Department, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - Fortesa Mehmeti
- Cardiology, University Hospital Geneva, University of Geneva, Geneva, Switzerland
| | - Helene Feliciano
- Department of Radiology, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - David Martin
- Cardiology, Cardiovascular Department, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - Julien Regamey
- Cardiology, Cardiovascular Department, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - Piergiorgio Tozzi
- Cardiac Surgery, Cardiovascular Department, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
| | - Philippe Meyer
- Cardiology, University Hospital Geneva, University of Geneva, Geneva, Switzerland
| | - Roger Hullin
- Cardiology, Cardiovascular Department, Lausanne University Hospital, University of Lausanne, Lausanne, Switzerland
- * E-mail:
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19
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Lu WA, Chen GY, Shih CC, Kuo CD. The use of heart rate variability measures as indicators of autonomic nervous modulation must be careful in patients after orthotopic heart transplantation. J Clin Monit Comput 2015; 30:687-97. [PMID: 26271510 PMCID: PMC5023756 DOI: 10.1007/s10877-015-9747-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 08/10/2015] [Indexed: 12/01/2022]
Abstract
The precise relation between heart rate variability (HRV) and autonomic re-innervation has not been established explicitly in patients after orthotopic heart transplantation (OHT), but can be inferred from the fact that the HRV is reduced immediately after OHT and may increase gradually with time. The aim of this study was to investigate the residual HRV in patients about 1–2 years after OHT, as compared with patients after coronary artery bypass graft (CABG) surgery. Thirteen patients who had received OHT and 14 patients who had received CABG surgery were recruited. HRV analysis was performed and the HRV measures in supine position were compared between these two groups of patients. We found that the mean (mRRI), standard deviation and coefficient of variation of RR intervals, total power, very low frequency power (VLFP), low frequency power, high frequency power (HFP), normalized VLFP (nVLFP) and low-/high-frequency power ratio in the OHT group were all significantly decreased, while the heart rate (HR) and normalized HFP (nHFP) were significantly increased, as compared with the CABG group. The decrease in HRV was more severe in the VLFP region. A smaller nVLFP and a greater nHFP were associated with a smaller mRRI and a larger HR in the OHT patients. The slope of the power law relation of HRV became positive in OHT patients, instead of negative in CABG patients. We conclude that patients after OHT have residual HRV which were characterized by severely depressed time and frequency domain HRV, increased HR and nHFP, decreased nVLFP, and positive slope of the power-law relation of HRV. The use of nHFP as the indicator of vagal modulation and the use of nVLFP as the indicator of renin-angiotensin modulation, thermoregulation and vagal withdrawal must be careful in the OHT patients.
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Affiliation(s)
- Wan-An Lu
- Laboratory of Biophysics, Department of Medical Research, Taipei Veterans General Hospital, Taipei, 112, Taiwan.,Institute of Cultural Asset and Reinvention, Fo-Guang University, Yilan, 262, Taiwan
| | - Gau-Yang Chen
- Department of Internal Medicine, Ten-Chen General Hospital, Yangmei, Tao-Yuan, 326, Taiwan.,Institute of Biomedical Engineering, National Yang-Ming University, Taipei, 112, Taiwan
| | - Chun-Che Shih
- Division of Cardiovascular Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei, 112, Taiwan
| | - Cheng-Deng Kuo
- Laboratory of Biophysics, Department of Medical Research, Taipei Veterans General Hospital, Taipei, 112, Taiwan. .,Division of Respiratory Therapy, Department of Chest Medicine, Taipei Veterans General Hospital, Taipei, 112, Taiwan.
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20
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Imamura T, Kinugawa K, Okada I, Kato N, Fujino T, Inaba T, Maki H, Hatano M, Kinoshita O, Nawata K, Kyo S, Ono M. Parasympathetic reinnervation accompanied by improved post-exercise heart rate recovery and quality of life in heart transplant recipients. Int Heart J 2015; 56:180-5. [PMID: 25740585 DOI: 10.1536/ihj.14-292] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Although sympathetic reinnervation is accompanied by the improvement of exercise tolerability during the first years after heart transplantation (HTx), little is known about parasympathetic reinnervation and its clinical impact. We enrolled 21 recipients (40 ± 16 years, 71% male) who had received successive cardiopulmonary exercise testing at 6 months, and 1 and 2 years after HTx. Exercise parameters such as peak oxygen consumption or achieved maximum load remained unchanged, whereas recovery parameters including heart rate (HR) recovery during 2 minutes and the delay of peak HR, which are influenced by parasympathetic activity, improved significantly during post-HTx 2 years (P < 0.05 for both). HR variability was analysed at post-HTx 6 months in 18 recipients, and high frequency power, representing parasympathetic activity, was significantly associated with the 2 recovery parameters (P < 0.05 for all). We also assessed quality of life using the Minnesota Living with Heart Failure (HF) Questionnaire at post-HTx 6 months and 2 years in the same 18 recipients, and those with improved recovery parameters enjoyed a better HF-specific quality of life (P < 0.05 for both). In conclusion, parasympathetic reinnervation emerges along with improved post-exercise recovery ability of HR and quality of life during post-HTx 2 years.
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Affiliation(s)
- Teruhiko Imamura
- Department of Therapeutic Strategy for Heart Failure, Graduate School of Medicine, The University of Tokyo
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21
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Imamura T, Kinugawa K, Fujino T, Inaba T, Maki H, Hatano M, Kinoshita O, Nawata K, Kyo S, Ono M. Recipients With Shorter Cardiopulmonary Bypass Time Achieve Improvement of Parasympathetic Reinnervation Within 6 Months After Heart Transplantation. Int Heart J 2014; 55:440-4. [DOI: 10.1536/ihj.14-111] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Teruhiko Imamura
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo
| | - Koichiro Kinugawa
- Department of Therapeutic Strategy for Heart Failure, Graduate School of Medicine, University of Tokyo
| | - Takeo Fujino
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo
| | - Toshiro Inaba
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo
| | - Hisataka Maki
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo
| | - Masaru Hatano
- Department of Cardiovascular Medicine, Graduate School of Medicine, University of Tokyo
| | - Osamu Kinoshita
- Department of Cardiac Surgery, Graduate School of Medicine, University of Tokyo
| | - Kan Nawata
- Department of Cardiac Surgery, Graduate School of Medicine, University of Tokyo
| | - Shunei Kyo
- Department of Therapeutic Strategy for Heart Failure, Graduate School of Medicine, University of Tokyo
| | - Minoru Ono
- Department of Cardiac Surgery, Graduate School of Medicine, University of Tokyo
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22
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Nytrøen K, Gullestad L. Exercise after heart transplantation: An overview. World J Transplant 2013; 3:78-90. [PMID: 24392312 PMCID: PMC3879527 DOI: 10.5500/wjt.v3.i4.78] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 07/15/2013] [Accepted: 07/25/2013] [Indexed: 02/05/2023] Open
Abstract
While life expectancy is greatly improved after a heart transplant, survival is still limited, and compared to the general population, the exercise capacity and health-related quality of life of heart transplant recipients are reduced. Increased exercise capacity is associated with a better prognosis. However, although several studies have documented positive effects of exercise after heart transplantation (HTx), little is known about the type, frequency and intensity of exercise that provides the greatest health benefits. Moreover, the long-term effects of exercise on co-morbidities and survival are also unclear. Exercise restrictions apply to patients with a denervated heart, and for decades, it was believed that the transplanted heart remained denervated. This has since been largely disproved, but despite the new knowledge, the exercise restrictions have largely remained, and up-to-date guidelines on exercise prescription after HTx do not exist. High-intensity, interval based aerobic exercise has repeatedly been documented to have superior positive effects and health benefits compared to moderate exercise. This applies to both healthy subjects as well as in several patient groups, such as patients with metabolic syndrome, coronary artery disease or heart failure. However, whether the effects of this type of exercise are also applicable to heart transplant populations has not yet been fully established. The purpose of this article is to give an overview of the current knowledge about the exercise capacity and effect of exercise among heart transplant recipients and to discuss future exercise strategies.
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23
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Lai FC, Chang WL, Jeng C. The relationship between physical activity and heart rate variability in orthotopic heart transplant recipients. J Clin Nurs 2012; 21:3235-43. [PMID: 22978768 DOI: 10.1111/j.1365-2702.2012.04070.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AIMS AND OBJECTIVES To investigate the relationship between physical activity and heart rate variability in orthotopic heart transplant recipients, to compare the difference in heart rate variability between patients one year after orthotopic heart transplant and healthy adults matched to the heart transplant recipients in terms of age, gender and physical activity levels. BACKGROUND Although physical activity affects the heart rate variability in patients with heart disease, there is a paucity of literature discussing the correlation between physical activity and heart rate variability among heart transplant recipients. DESIGN This was a descriptive and cross-sectional study. METHODS A total of 120 eligible subjects were divided into the orthotopic heart transplant recipient group (n = 60) and the healthy adult group (n = 60). The Seven-day Physical Activity Recall questionnaire was used to record the subjects' amount of physical activity per week. Heart rate variety parameters were determined by separate frequency domain components. RESULTS Results indicated heart transplant recipients' heart rate variety was significantly lower than that of healthy adults in terms of mean, sdr, total power (ms(2)), low frequency (ms(2)), low frequency (nu), high frequency (ms(2)) and low frequency/high frequency. Heart transplant recipients' heart rate variety including total power (ms(2)), low frequency (ms(2)) and high frequency (ms(2)) was 18·2, 2 and 7·2% of healthy controls, respectively; the amount of absolutely and relatively moderate physical activity was positively related to high frequency (ms(2)) and high frequency (nu), but was negatively related to low frequency/high frequency. High frequency (nu) increases while the total amount of weekly physical activity increases. CONCLUSIONS Results confirmed that the more the moderate physical activity performed, the better the patient's heart rate variability. RELEVANCE TO CLINICAL PRACTICE We suggest that clinical care providers have to encourage heart transplant recipients to engage in moderate physical activity.
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Affiliation(s)
- Fu-Chih Lai
- College of Nursing, Taipei Medical University, Taipei, Taiwan
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24
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Vanderlaan RD, Conway J, Manlhiot C, McCrindle BW, Dipchand AI. Enhanced exercise performance and survival associated with evidence of autonomic reinnervation in pediatric heart transplant recipients. Am J Transplant 2012; 12:2157-63. [PMID: 22487123 DOI: 10.1111/j.1600-6143.2012.04046.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Following heart transplantation (HTx), loss of autonomic input to the allograft results in elevated resting heart rate (HR) and decreased chronotropic reserve. As enhanced exercise capacity and HR recovery post exercise are suggestive of reinnervation in pediatric cohorts, we used heart rate variability (HRV) analysis to assess autonomic reinnervation in pediatric HTx recipients. Pediatric patients transplanted between 1996 and 2010 and with serial 24-hour Holter recordings post-HTx were analyzed for HRV using time and frequency domain measures. Of 112 patients, 68 (57%) showed evidence of autonomic reinnervation that was not associated with age at HTx. Evidence of reinnervation was associated with a significant increase in low-frequency power spectrum (p<0.001), suggesting sympathetic reinnervation. Patients with evidence of reinnervation showed higher percent-predicted maxVO(2) on performing an exercise test (+10.2 ± 3.6%, p = 0.006) and improved HR recovery at 3 minutes (-11.4 ± 3.9 bpm, p = 0.004), but no difference in percent-predicted maximal HR. Cox hazards modeling using presumed sinus reinnervation criteria at last Holter recording as a time-dependent covariate was associated with decreased hazard of mortality and/or retransplantation (HR: 0.2, 95% CI 0.04-1.0, p = 0.05). In conclusion, a majority of pediatric HTx recipients demonstrate evidence of reinnervation that is associated with functional outcomes. Studies to assess graft reinnervation as a marker of long-term prognosis are warranted.
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Affiliation(s)
- R D Vanderlaan
- Labatt Heart Centre, Hospital for Sick Children, Department of Pediatrics, University of Toronto, Ontario, Canada
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Cornelissen VA, Vanhaecke J, Aubert AE, Fagard RH. Heart rate variability after heart transplantation: a 10-year longitudinal follow-up study. J Cardiol 2012; 59:220-4. [PMID: 22266458 DOI: 10.1016/j.jjcc.2011.12.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 12/05/2011] [Accepted: 12/12/2011] [Indexed: 10/14/2022]
Abstract
BACKGROUND Cross-sectional studies suggest, by use of heart rate variability (HRV), that partial re-innervation of the sinus node may occur after heart transplantation (HTx). Our aim was to test this hypothesis by examining HRV in long-term longitudinal follow-up study of HTx recipients. METHODS AND RESULTS 14 HTx recipients (11 men) were studied 1-48 (median 13) months (baseline) and 119-172 (median 141) months after HTx (follow-up). At baseline and follow-up, electrocardiographic RR interval was continuously recorded in the supine position for 20 min. The signals were analyzed in the time domain and in the frequency domain by means of power spectral analysis. RR-interval decreased significantly from baseline to follow-up (p<0.05). This was associated with an increase of total power (p<0.001), absolute low frequency (p<0.001), and high frequency power (p<0.001), but unchanged relative low frequency and high frequency power. CONCLUSIONS The observed changes in HRV during long-term follow-up after HTx are compatible with partial re-innervation of the cardiac sinus node, as has been suggested by cross-sectional studies.
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Affiliation(s)
- Véronique A Cornelissen
- Research Centre for Cardiovascular and Respiratory Rehabilitation, Department of Rehabilitation Sciences, University of Leuven, K.U. Leuven, Leuven, Belgium.
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Hsieh PL, Wu YT, Chao WJ. Effects of exercise training in heart transplant recipients: a meta-analysis. Cardiology 2011; 120:27-35. [PMID: 22094922 DOI: 10.1159/000332998] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Accepted: 08/25/2011] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Muscle wasting and exercise intolerance are common in heart transplant recipients. Most studies on the effects of exercise training have used relatively small sample sizes and are heterogeneous in nature. The purpose of this meta-analysis was to systematically review the relevant studies and investigate the effects of exercise training on exercise capacity and muscle strength in heart transplant recipients. METHODS A systematic search was adopted from electronic databases and relevant references, using medical subject heading key words related to heart transplantation and exercise. Only randomized controlled trials with exercise intervention versus usual care were included. The data were expressed as the weighted mean differences with 95% confidence intervals (CIs). RESULTS Altogether 6 studies were included. Peak oxygen consumption (VO(2)) was reported in 4 trials (117 patients), and muscle strength was reported in 3 trials (67 patients). Peak VO(2) was significantly increased by 2.34 ml/kg/min (95% CI 0.63-4.05). One-repetition maxima of the chest press (23.28 kg, 95% CI 0.64-45.91) and leg press (28.84 kg, 95% CI 5.70-51.98) were significantly improved by exercise training. CONCLUSION Exercise training is recommended for heart transplant recipients to improve peak VO(2) and muscle strength despite the small number of trials included in this meta-analysis.
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Affiliation(s)
- Ping-Lun Hsieh
- School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan, ROC
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Chronotropic responses to exercise in heart transplant recipients: 1-yr follow-up. Am J Phys Med Rehabil 2011; 90:579-88. [PMID: 21765276 DOI: 10.1097/phm.0b013e31821f711d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE Partial normalization of the heart rate (HR) response can take place some time after heart transplantation (HTx), but the extent to which this occurs, its time course, and functional significance remain unclear. DESIGN Seventy-seven heart transplantation patients underwent an exercise test at approximately 1, 6, and 12 mos after heart transplantation, consisting of a resting period, a submaximal exercise test, and a maximal exercise test with stair climbing, followed by a recovery period. An HR monitor was used for continuous surveillance of HR. RESULTS During the follow-up, HR at rest did not change, whereas all other HR parameters obtained during and after exercise improved, demonstrating a more rapid increase, a higher peak, and a more rapid decline in HR after stopping exercise. Age-predicted maximum HR at baseline was 73% ± 9%, improving to 83% ± 10% at 6 mos (P < 0.001) and to 90% ± 10% at 12 mos (P < 0.001), whereas the Chronotropic Response Index at baseline was 0.49 ± 0.15, improving to 0.67 ± 0.17 at 6 mos (P < 0.001) and to 0.81 ± 0.23 at 12 mos (P < 0.001). CONCLUSIONS Partial normalization of HR was achieved by 71% of heart transplantation patients at 12 mos, with significant changes occurring within 6 mos in most subjects. These findings should contribute to reducing the exercise restrictions that apply to the denervated heart.
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Carvalho VO, Bocchi EA, Pascoalino LN, Guimarães GV. The relationship between heart rate and oxygen consumption in heart transplant recipients during a cardiopulmonary exercise test. Int J Cardiol 2010; 145:158-60. [DOI: 10.1016/j.ijcard.2009.07.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Accepted: 07/25/2009] [Indexed: 11/25/2022]
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Carvalho VO, Bocchi EA, Guimarães GV. Aerobic Exercise Prescription in Adult Heart Transplant Recipients: A Review. Cardiovasc Ther 2010; 29:322-6. [DOI: 10.1111/j.1755-5922.2010.00175.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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Abstract
Differences in the duration of the cycles reflects the balance of the sympathetic and parasympathetic influence on the heart. Variance in the heart rate correlates to the breathing cycle, to baroreflex sensitivity, to day and night alternations and to changes in the vegetative tone evoked by physical exercises. Analysis of the time and/or frequency power domain of the heart rate variance is expected to have diagnostic value in physiological and pathological situations as adaptation to training, overtraining, heart disease etc. Both time- and frequency domains reflect the same physiological phenomenon but from different point of view. Vagus tonus is reflected in the high frequency part of the range of variance, while an increased sympathetic tone enriches the low frequency part of the variations of the duration of the consecutive heart cycles. This technically simple and relatively inexpensive method has inspired a couple of clinical and sports medical studies. Certain tendencies seem to be clear, but for individual diagnosis or for prognosis the data must be treated very carefully.
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Affiliation(s)
- Péter Apor
- Semmelweis Egyetem, Testnevelési és Sporttudományi Kar, Budapest, Czakó u. 9., 1016.
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Delgado JF, Manito N, Segovia J, Almenar L, Arizón JM, Campreciós M, Crespo-Leiro MG, Díaz B, González-Vílchez F, Mirabet S, Palomo J, Roig E, de la Torre JM. The use of proliferation signal inhibitors in the prevention and treatment of allograft vasculopathy in heart transplantation. Transplant Rev (Orlando) 2009; 23:69-79. [PMID: 19298938 DOI: 10.1016/j.trre.2009.01.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Cardiac allograft vasculopathy (CAV) currently represents one of the most important causes of long-term morbidity and mortality in the heart transplant population. In well-designed studies with de novo patients, the use of proliferation signal inhibitors (PSIs; everolimus and sirolimus) has been shown to significantly prevent the intimal growth of graft coronary arteries in comparison to other immunosuppressive regimens, reducing the incidence of vasculopathy at 12 and 24 months. In addition, conversion to PSIs in maintenance patients with established CAV has also shown promising results in the reduction of the progression of the disease and its clinical consequences. For these reasons the interest shown by various transplantation units in the potential role of PSIs in this field is growing. The aim of the present article is to review the information obtained to date on the use of PSIs in heart transplant recipients, both in the prevention and the treatment of CAV. The principal published recommendations on the introduction and appropriate management of these drugs in clinical practice are also collected, as well as certain recommendations given by the authors based on their experience.
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Affiliation(s)
- Juan F Delgado
- Unidad de Insuficiencia Cardiaca y Trasplante, Servicio de Cardiología, Hospital 12 de Octubre, 28041 Madrid, Spain.
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Retzlaff B, Bauernschmitt R, Malberg H, Brockmann G, Uhl C, Lange R, Kurths J, Bretthauer G, Wessel N. Depression of cardiovascular autonomic function is more pronounced after mitral valve surgery: evidence for direct trauma. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2009; 367:1251-1263. [PMID: 19324707 DOI: 10.1098/rsta.2008.0272] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The analysis of baroreflex sensitivity (BRS) and heart rate variability (HRV) leads to additional insights into patients' prognosis after cardiovascular events. The following study was performed to assess the differences in the post-operative recovery of autonomic regulation after mitral valve (MV) and aortic valve (AV) surgery with a heart-lung machine. Among the 43 consecutive male patients enrolled in a prospective study, 26 underwent isolated AV surgery and 17 isolated MV surgery. Blood pressure as well as ECG signals were recorded the day before, 24 hours after and one week after surgery. BRS was calculated according to the dual sequence method, and HRV was calculated using standard linear as well as nonlinear parameters. There were no major differences between the two groups in the pre-operative values. At 24 hours a comparable depression of HRV and BRS in both groups was observed, while at 7 days there was partial recovery in AV patients, which was absent in MV patients: p(AV versus MV)<0.001. While the response of the autonomic system to surgery is similar in AV and MV patients, there is obviously a decreased ability to recover in MV patients, probably attributed to traumatic lesions of the autonomic nervous system by opening the atria. Ongoing research is required for further clarification of the pathophysiology of this phenomenon and to establish strategies to restore autonomic function.
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Changes of autonomic nervous system function in healthy young men during initial phase at acute high-altitude exposure. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/s1000-1948(08)60053-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Zhang R, Haverich A, Strüber M, Simon A, Pichlmaier M, Bara C. Effects of ivabradine on allograft function and exercise performance in heart transplant recipients with permanent sinus tachycardia. Clin Res Cardiol 2008; 97:811-9. [PMID: 18648727 DOI: 10.1007/s00392-008-0690-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2007] [Accepted: 06/11/2008] [Indexed: 12/22/2022]
Abstract
Aim of this retrospective analysis was to evaluate the effects of ivabradine given primarily as a heart rate-lowering agent on allograft function and cardiopulmonary performance in heart transplant recipients with permanent sinus tachycardia. Starting May 2006, 26 heart transplant recipients with permanent sinus tachycardia received ivabradine (5 mg bid). It was discontinued early in 3 patients (11.5%) due to adverse events. In the remaining 23 patients, resting heart rate (HR) was significantly lowered from 106.3 +/- 9.1 to 82.2 +/- 6.3 bpm after 3 weeks of treatment. The effect remained constant during the remaining treatment period, whereas resting blood pressure was not affected. After 12 weeks of ivabradine treatment, the corrected QT interval was significantly reduced into the range seen in normal individuals. Left ventricular (LV) end-diastolic posterior wall thickness, LV mass and LV mass index were also found to have decreased significantly. There was a trend to improvement of cardiopulmonary performance and LV ejection fraction, both of which did not reach statistical significance, however. It may be concluded that ivabradine successfully reduced the resting HR of heart transplant recipients with sinus tachycardia without negatively influencing the blood pressure. The definitive impact of ivabradine on LV mass regression and cardiopulmonary performance require further prospective, randomized and controlled trials.
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Affiliation(s)
- R Zhang
- Department of Cardiac, Thoracic, Transplantation and Vascular Surgery, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
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Rowan WH, Campen MJ, Wichers LB, Watkinson WP. Heart rate variability in rodents: uses and caveats in toxicological studies. Cardiovasc Toxicol 2007; 7:28-51. [PMID: 17646680 DOI: 10.1007/s12012-007-0004-6] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/1999] [Revised: 11/30/1999] [Accepted: 11/30/1999] [Indexed: 01/04/2023]
Abstract
Heart rate variability (HRV) is a measure of cardiac pacing dynamics that has recently garnered a great deal of interest in environmental health studies. While the use of these measures has become popular, much uncertainty remains in the interpretation of results, both in terms of human and animal research. In humans, HRV endpoints, specifically chronic alterations in baseline HRV patterns, have been reasonably well characterized as prognostic indicators of adverse outcomes for a variety of diseases. However, such information is lacking for reversible HRV changes that may be induced by short-term exposures to environmental toxicants. Furthermore, there are minimal substantive data, either acute or chronic, regarding the pathological interpretation or prognostic value of toxicant-induced changes in HRV in rodents. The present report summarizes the physiological and clinical aspects of HRV, the methodological processes for obtaining these endpoints, and previous human and animal studies in the field of environmental health. Furthermore, we include a discussion of important caveats and recommendations for the interpretation of HRV data in animal research.
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Affiliation(s)
- William H Rowan
- Pulmonary Toxicology Branch, Experimental Toxicology Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711, USA
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Krizanova O, Myslivecek J, Tillinger A, Jurkovicova D, Kubovcakova L. Adrenergic and calcium modulation of the heart in stress: from molecular biology to function. Stress 2007; 10:173-84. [PMID: 17514586 DOI: 10.1080/10253890701305754] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
There is strong evidence about the importance of catecholamines and calcium signaling in heart function. Also, interaction of these two systems is well documented. Catecholamines signal through adrenergic receptors, and further activate calcium transport either from the extracellular space, or from the intracellular calcium stores. This review summarizes current knowledge on catecholamine production in the heart, with special focus on the final enzyme in the catecholamine synthesizing pathway, phenylethanolamine N-methyltransferase (PNMT), in different cell types in the heart. Further, signaling through different types of adrenergic receptors in physiological conditions and after exposure to different stressors is discussed. Also, part of this review considers activation of an intracellular calcium transport system via inositol 1,4,5-trisphosphate receptor and to possible functional consequences in control and stress conditions.
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Affiliation(s)
- O Krizanova
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Bratislava, Slovakia.
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Dalla Pozza R, Fuchs A, Bechtold S, Kozlik-Feldmann R, Daebritz S, Netz H. Short-term testing of heart rate variability in heart-transplanted children: equal to 24-h ECG recordings? Clin Transplant 2007; 20:438-42. [PMID: 16842518 DOI: 10.1111/j.1399-0012.2006.00502.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Heart rate variability (HRV) is reduced in adults and children after cardiac transplantation. Testing of HRV has been used to assess re-innervation of the cardiac graft; its reliability in ruling out acute graft rejection is still under investigation. This study used a short-term test on HRV in 23 heart and heart-lung transplanted children and adolescents and compared the results with 24-h ECG recordings. PATIENTS AND METHODS Twenty-three subjects (16.3+/-4.2 yr; 10 females) underwent a 10-min HRV test at two occasions and one 24-h ECG. HRV was calculated according to the time domain method (RR interval, standard deviation of RR interval) and the frequency domain method (total power, LF and HF for assessment of sympathovagal modulation of heart rate). RESULTS Correlation between the short-term tests and 24-h ECG was high with regard to the frequency domain analysis of HRV. Correlation was less pronounced in the time domain method. CONCLUSIONS In heart and heart-lung-transplanted children and adolescents, due to reduced overall HRV short-term testing may give as reliable data as 24-h ECG. Therefore, especially when power spectral analysis has to be performed as a longitudinal assessment of re-innervation of the cardiac graft, short-term testing may offer an easily applicable and non-invasive diagnostic tool. Further studies are warranted to investigate whether HRV testing may contribute to rule out acute graft rejection.
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Affiliation(s)
- R Dalla Pozza
- Department of Pediatric Cardiology [corrected] Ludwig-Maximilians University, Munich, Germany.
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Harris WS, Gonzales M, Laney N, Sastre A, Borkon AM. Effects of omega-3 fatty acids on heart rate in cardiac transplant recipients. Am J Cardiol 2006; 98:1393-5. [PMID: 17134636 DOI: 10.1016/j.amjcard.2006.06.033] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Revised: 06/13/2006] [Accepted: 06/13/2006] [Indexed: 11/21/2022]
Abstract
Omega-3 fatty acid (n-3 FA) consumption has been linked to reductions in the risk of death from coronary heart disease and, recently, to lower heart rates (HRs). The investigators previously observed a reduction of 5 beats/min in HR in patients with coronary heart disease given n-3 FAs (eicosapentaenoic acid and docosahexaenoic acid) for 4 months. Reductions in HR may be explained by enhanced vagal tone, influences on cardiac voltage-gated ion channels, or both. The hypothesis that n-3 FAs would affect HR independent of vagal input was investigated by studying the effects of n-3 FA supplementation on HR in patients with denervated hearts after orthotopic heart transplantation. Electrocardiographic data obtained in 2 prospective trials in which 18 heart transplant recipients received n-3 FA supplementation (1 to 3.4 g/day) for 4 to 6 months were collected. Patients were studied 4.4 +/- 2.6 years after transplantation. HR, QRS complex, and QTc duration were determined before and after treatment. Pretreatment HR was reduced from 88 +/- 14 to 83 +/- 13 beats/min after n-3 FA treatment (p = 0.016). QRS duration increased from 107 +/- 24 to 117 +/- 25 ms (p = 0.001). QTc duration remained unchanged from baseline (427 +/- 34 ms) to study end (424 +/- 39 ms). In conclusion, n-3 FA supplementation reduced HR and prolonged QRS duration in heart transplant recipients who were presumably devoid of vagal innervation. These findings suggest that n-3 FAs may modify electrophysiologic properties of the myocardium itself.
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Affiliation(s)
- William S Harris
- University of Missouri-Kansas City School of Medicine, Kansas City, Missouri, USA
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Cardiac Allograft Vasculopathy: Differences in De Novo and Maintenance Heart Transplant Recipients. Transplantation 2006. [DOI: 10.1097/01.tp.0000243150.89762.fc] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Effects of physical training on cardiovascular control after heart transplantation. Int J Cardiol 2006; 118:356-62. [PMID: 17050012 DOI: 10.1016/j.ijcard.2006.07.032] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2006] [Accepted: 07/11/2006] [Indexed: 12/14/2022]
Abstract
BACKGROUND Exercise performance in heart-transplanted patients increases with respect to pre-transplantation but remains subnormal, and it does not improve with time after surgery. Possible causes include persisting denervation, and sympathetic vasoconstriction inducing functional vascular abnormalities that prevent adequate increase in blood flow to the exercising limbs. We tested the effects of physical training on baroreceptors-mediated control of heart rate and blood pressure in recently heart-transplanted subjects. METHODS Patients were randomly allocated to physical training (n=13, 30 min cycling at 60-70% of peak oxygen consumption for 5 days/week for 6 months) or to control (n=11). Upright exercise test to exhaustion was performed at the beginning of the study after 3 and 6 months. Reflex changes in RR interval and blood pressure in response to sinusoidal neck suction (6 and 12 cycles/min 0 to -30 mm Hg swing) were considered as evidence of reinnervation and baroreflex control of blood pressure, respectively. RESULTS After 6 months peak oxygen consumption (p<0.001), exercise time (p<0.01) and workload (p<0.01) increased in trained patients. Before training RR interval and blood pressure were not modified by neck suction. After physical training systolic (p<0.01) and diastolic blood pressure decreased, RR interval and blood pressure could be modulated (p<0.05) by slow (6 cycles/min) neck suction, indicating initial cardiac sympathetic reinnervation and restored sensitivity to autonomic modulation on the arteries. No changes were observed in controls. CONCLUSIONS Physical training improved exercise performance and the control exerted by the autonomic nervous system through the sympathetic nerves at both cardiac and vascular level.
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Horenstein MS, Idriss SF, Hamilton RM, Kanter RJ, Webster PA, Karpawich PP. Efficacy of signal-averaged electrocardiography in the young orthotopic heart transplant patient to detect allograft rejection. Pediatr Cardiol 2006; 27:589-93. [PMID: 16897316 DOI: 10.1007/s00246-005-1155-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Endomyocardial biopsy is the gold standard survey for cardiac graft rejection. Signal-averaged electrocardiography (SAECG) identifies slowly conducting, diseased myocardium. We sought to determine whether SAECG is a sensitive, noninvasive transplant surveillance method in the young.Ninety-four SAECGs recorded prior to biopsy in 20 young transplant (OHT) patients and those from 15 healthy age-matched controls (CTL) were analyzed. In the OHT group, 56 no-rejection (NOREJ) (ISHLT grades 0 or 1 A) and 37 acute rejection (REJ) (ISHLT grades IB, 2, and 3A) SAECGs were compared, SAECGs were filtered at 40-255 Hz. Total QRS duration (QRSd), duration of terminal low amplitude of QRS under 40 microV (LAS), and root mean square amplitude of terminal 40 msec of QRS (RMS40) were compared.SAECGs were significantly different in CTL vs NOREJ but not in NOREJ vs REJ: QRSd, 81.7 +/- 8, 107.2 +/- 18.4, and 112.3 +/- 21.6 msec, respectively; LAS, (18 +/- 5.8, 23.6 +/- 10.7, and 27 +/- 14.8 msec, respectively; and RMS40, (169.3 +/- 100.4, 68 +/- 48.8, and 57.5 +/- 45.6 microV, respectively. Children following OHT exhibited significant differences in the SAECG compared to controls. Differences between the NOREJ and REJ groups were negligible. Therefore, SAECG may not be effective in detecting OHT rejection in the young.
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Affiliation(s)
- M S Horenstein
- Duke University Medical Center, Pediatric Cardiology Division, Erwin Road, Durham, NC 27710, USA.
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Pozza RD, Kleinmann A, Bechtold S, Fuchs A, Netz H. Reinnervation after heart transplantation in children: results of short-time heart rate variability testing. Pediatr Transplant 2006; 10:429-33. [PMID: 16712599 DOI: 10.1111/j.1399-3046.2006.00485.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To detect impairment in short-term heart rate variability (HRV) in children after heart and heart-lung transplantation (TX) as reported in adults. To assess vagal and sympathetic influence on the donor heart rate using frequency domain analysis of HRV. METHODS AND RESULTS Measurement of short-term HRV was performed in 17 patients (age 16.9+/-3.6, 6.1+/-3.7 yr after TX) and 12 healthy controls (age 14.8+/-3.0 yr). Testing consisted of a resting phase of 15 minutes followed by a tilt phase of 45 min. All HRV parameters were significantly impaired in transplanted patients: RR interval (RRI) 717.2+/-122.5 m/s (controls 827+/-139.7, p<0.05), standard deviation of RR interval (RRI-SD) 20.1+/-15.5 (89.9+/-38.4, p<0.001), RRI at tilt 607.9+/-79.7 (654.0+/-104.7, NS), RRI-SD at tilt 21.1+/-20.0 (60.4+/-31.4, p<0.001). Low-frequency (LF)/High-frequency (HF) ratio of HRV showed prominent sympathetic influence in TX-patients (3.38+/-5.60 vs. 1.18+/-0.86, NS) increasing during tilting (5.91+/-8.36 vs. 4.74+/-5.27, NS). In subgroup analysis, 4 yr after TX an increasing sympathetic control of heart rate was observed. CONCLUSION Short-term HRV is severely impaired in children after TX. If changes are observed, they are time-related and show increasing sympathetic influence starting from 4 yr after TX.
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Affiliation(s)
- Robert Dalla Pozza
- Department of Pediatric Cardiology, Ludwig Maximilians University, Munich, Germany.
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Dalla Pozza R, Kleinmann A, Bechtold S, Netz H. Hypertension in Heart and Heart-Lung Transplanted Children: Does Impaired Baroreceptor Function Play a Role? Transplantation 2006; 81:71-5. [PMID: 16421479 DOI: 10.1097/01.tp.0000189927.70547.ef] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Baroreceptor control of beat-to-beat blood pressure in heart and heart-lung-transplanted children is impaired. Time-related trends of baroreceptor function recovery are studied and a possible correlation of baroreflex impairment and systolic hypertension may give evidence for supplemental medical treatment of hypertension. METHODS Seventeen patients (six female) 6.1 +/- 3.7 years (range 0.8-13.0 years) after heart (n = 14) and heart-lung (n = 3) transplantation (TX) were studied. Twelve healthy children and 10 children after liver and bone marrow TX taking cyclosporine A (CyA) served as control groups 1 and 2, respectively. Baroreceptor sensitivity (BRS) was calculated from noninvasive systolic beat-to-beat blood pressure (sBP) measurement during a resting phase and a tilt-table test. RESULTS BRS was significantly impaired in the study group at rest and during tilting; mean sBP was slightly elevated. Significant difference between patients on CyA and healthy controls was not observed. Discrete recovery of BRS occurred after 4 years postTX with decreased sBP (n = 12 pts, BRS 6.78 +/- 7.44 msec/mmHg, sBP 116.2 +/- 12.4 mmHg) when compared to a postTX time course of less than 4 years (n = 5 pts, BRS 4.02 +/- 4.21 msec/mmHg, sBP 122.0 +/- 6.7 mmHg, P = NS). CONCLUSION BRS is disturbed after TX in children; four years postTX, a minimal recovery of BRS and a discrete reduction of sBP seem to occur. Those patients with a persistent low BRS and elevated sBP may profit from pharmacological influence in sympathovagal imbalance.
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Affiliation(s)
- Robert Dalla Pozza
- Department of Pediatric Cardiology, Ludwig-Maximilians-University, Munich, Germany.
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Boettger R, Lee J, Rifkin C, Kayser S. Heart transplantation and altered drug response, part I: heart transplantation and innervation. PROGRESS IN CARDIOVASCULAR NURSING 2006; 21:100-3. [PMID: 16760694 DOI: 10.1111/j.0889-7204.2006.04983.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Affiliation(s)
- Rebecca Boettger
- Department of Pharmaceutical Services, School of Pharmacy, University of California San Francisco, CA 94143-0622, USA
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