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Varma PK, Vijayakumar M, Bhuvaneshwar GS, Kumar AS, Krishna N. Long-term evaluation of TTK Chitra™ heart valve prosthesis - a retrospective-prospective cohort study. Indian J Thorac Cardiovasc Surg 2023; 39:14-26. [PMID: 36531667 PMCID: PMC9735205 DOI: 10.1007/s12055-022-01437-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 10/25/2022] [Accepted: 10/28/2022] [Indexed: 12/04/2022] Open
Abstract
Purpose The TTK Chitra™ heart valve has more than 1,40,000 implantations so far, but no long-term data has been published. This study aims to provide long-term results of the valve. Methodology A cohort of 476 patients with implantations from January 2006 to December 2018 were followed up prospectively consisting of 104 aortic valve replacement (AVR), 87 double valve replacement (DVR), and 285 mitral valve replacement (MVR) patients. Total follow-up was 4079 patient-years (py) (AVR = 983, MVR = 2392, DVR = 704), being 96% complete. Results The results showed that actuarial survival at 15 years was 82.3% for AVR, 60.7% for MVR, and 52.2% for DVR. Freedom from all valve-related mortality and morbidity at 15 years was 73.8%, 64.8%, and 61.9% for AVR, MVR, and DVR, respectively. There was one instance of structural failure of valve disc leading to severe valvar regurgitation. Valve thrombosis incidence was 1 in AVR (0.1%/py), 6 in MVR (0.25%/py), and 1 in DVR (0.14%/py). Thrombo-embolic episodes occurred in 50 patients (AVR = 7 patients at 0.7%/py; MVR = 36 patients at 1.5%/py; DVR = 7 patients at 0.99%/py) and major hemorrhage (bleeding) in 24 patients (AVR = 0.61%/py; MVR = 0.5%/py; and DVR = 0.85%/py). The linearized rates of adverse events in this study were found to be lower than earlier published results. Conclusion The results highlight the continued safety and performance of the TTK Chitra™ heart valve (TTKCHV) in the long term at 15 years. Supplementary Information The online version contains supplementary material available at 10.1007/s12055-022-01437-9.
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Affiliation(s)
- Praveen Kerala Varma
- Department of Cardiovascular and Thoracic Surgery, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham (Amrita University), Kochi, India
| | - Maniyal Vijayakumar
- Department of Cardiology, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham (Amrita University), Kochi, India
| | | | - Adarsh Syla Kumar
- Department of Cardiovascular and Thoracic Surgery, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham (Amrita University), Kochi, India
| | - Neethu Krishna
- Department of Cardiovascular and Thoracic Surgery, Amrita Institute of Medical Sciences and Research Centre, Amrita Vishwa Vidyapeetham (Amrita University), Kochi, India
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Panicker VT, Sreekantan R, Lokanath N. Preoperative mitral annulus size - Can we get it right? Ann Card Anaesth 2021; 24:315-318. [PMID: 34269261 PMCID: PMC8404588 DOI: 10.4103/aca.aca_91_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/21/2020] [Accepted: 08/06/2020] [Indexed: 11/30/2022] Open
Abstract
Objective We looked for a correlation between the surgically measured mitral valve size and the cardiac dimensions (left ventricle internal diameter, left atrial size, aorta size, and body surface area) measured by preoperative and intraoperative echocardiography. We also assessed to see if we could predict the mitral prosthesis size based on the correlation data obtained. Methods The hospital records of 180 patients who underwent mitral valve replacement (MVR) with TTK Chitra valve between January 2008 and December 2012 at our hospital, were studied. The correlation between surgically measured mitral annulus size to left ventricular internal diameter systolic (LVIDS) and diastolic (LVIDD), left atrial size (linear measurement), and aorta size on echocardiography and body surface area was calculated using Pearson correlation coefficient. Mean LVIDS was calculated for each valve prosthesis size separately and the correlation was studied. Results The correlation between mitral valve prosthesis size and left ventricular internal diameter (systolic) showed a Pearson coefficient of 3.3 with significance at the level 0.01. Mitral valve size and left atrial size showed a correlation coefficient of 2.7 with significance at the level 0.01. The correlation coefficient for mitral valve size with left ventricular internal diameter diastolic, aorta and body surface area were 2.5, 1.9, and 1.8, respectively. There was a gradual increase in the mean LVIDS with increase in the prosthetic valve size. Box plot and scatter plot showed linear correlation between valve size and mean LVIDS.
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Affiliation(s)
- Varghese T. Panicker
- Department of Cardiovascular and Thoracic Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Renjith Sreekantan
- Department of Cardiovascular and Thoracic Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
| | - Nagananda Lokanath
- Department of Cardiovascular and Thoracic Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
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Babu S, Sreedhar R, Gadhinglajkar SV, Dash PK, Sukesan S, Pillai V, Panicker VT, Shriram LP, Aggarwal N. Intraoperative Transesophageal and Postoperative Transthoracic Echocardiographic Evaluation of a Mechanical Heart Valve Prosthesis Implanted at Aortic Position. J Cardiothorac Vasc Anesth 2017; 32:782-789. [PMID: 29217244 DOI: 10.1053/j.jvca.2017.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The aims of this study were to evaluate the intraoperative transesophageal echocardiographic (iTEE) characteristics and Doppler flow profile of aortic Chitra heart valve prosthesis (CHVP) under stable hemodynamic and loading conditions, and to compare and correlate the iTEE data with the postoperative transthoracic echocardiography (TTE) data obtained at 48 hours (TTE1) and 3 months (TTE2) after the surgery. DESIGN Prospective, observational study. SETTING University-level tertiary referral hospital. PARTICIPANTS Forty patients between 18 years and 65 years of age undergoing elective aortic valve replacement (AVR) using CHVP during the period January 2015 to August 2016. INTERVENTIONS After obtaining permission from institutional ethics committee, 40 patients undergoing elective AVR were studied prospectively. The iTEE examination was performed in the pre-cardiopulmonary bypass (CPB) and post-CPB period in all the study subjects. CHVP was subjected to iTEE two-dimensional (2D) echo, color Doppler, and spectral Doppler evaluation under stable hemodynamic and loading condition in the post-CPB period after the administration of protamine. The CHVP were re-evaluated using TTE in all the patients 48 hours after the surgery (TTE1) and 3 months after the surgery (TTE2). The iTEE and postoperative TTE Doppler values were compared and correlated. MEASUREMENTS AND MAIN RESULTS The CHVP could be imaged adequately and interrogated with Doppler in all the patients. None of the patients had restriction of occluder mobility or unstable seating of the valve. The intraoperative flow dependent (peak velocity [PV] and mean pressure gradient [MPG]) and less flow dependent (Doppler velocity index, acceleration time, acceleration time/ejection time, effective orifice area [EOA] and indexed EOA) Doppler parameters of CHVP were measured as per the American Society of Echocardiography recommendations. The PV and MPG of CHVP measured by iTEE showed no statistical difference (p > 0.05) and were in limits of agreement when compared with TTE1 and TTE2 data. CONCLUSION The iTEE features of CHVP were found compliant with the criteria set by the ASE defining normal functioning of an aortic valve prosthesis. The iTEE Doppler parameters obtained under stable loading conditions strongly predicted the postoperative values of Doppler parameters on TTE examination. The iTEE Doppler values can be used as the reference values for the postoperative follow up studies.
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Affiliation(s)
- Saravana Babu
- Department of Anesthesia, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Rupa Sreedhar
- Department of Anesthesia, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India.
| | - Shrinivas V Gadhinglajkar
- Department of Anesthesia, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Prasanta Kumar Dash
- Department of Anesthesia, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Subin Sukesan
- Department of Anesthesia, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Vivek Pillai
- Department of Cardiothoracic and Vascular Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Varghese T Panicker
- Department of Cardiothoracic and Vascular Surgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Lovhale Pravin Shriram
- Department of Anesthesia, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
| | - Neelam Aggarwal
- Department of Anesthesia, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, India
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Kim JS, Kang MK, Cho AJ, Seo YB, Kim KI. Complicated infective endocarditis: a case series. J Med Case Rep 2017; 11:128. [PMID: 28482860 PMCID: PMC5423006 DOI: 10.1186/s13256-017-1274-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 03/23/2017] [Indexed: 11/17/2022] Open
Abstract
Background Infective endocarditis is associated with not only cardiac complications but also neurologic, renal, musculoskeletal, and systemic complications related to the infection, such as embolization, metastatic infection, and mycotic aneurysm. Case presentation We report three cases (the first patient is Chinese and the other two are Koreans) of complicated infective endocarditis; two of the cases were associated with a mycotic aneurysm, and one case was associated with a splenic abscess. One case of a patient with prosthetic valve endocarditis was complicated by intracerebral hemorrhage caused by mycotic aneurysm rupture. A second case of a patient with right-sided valve endocarditis associated with a central catheter was complicated by an abdominal aortic mycotic aneurysm. The third patient had a splenic infarction and abscess associated with infected cardiac thrombi. Conclusions Complicated infective endocarditis is rare and is associated with cardiac, neurologic, renal, musculoskeletal, and systemic complications related to infection, such as embolization, metastatic infection, and mycotic aneurysm. Infective endocarditis caused by Staphylococcus aureus is more frequently associated with complications. Because the mortality rate increases when complications develop, aggressive antibiotic therapy and surgery, combined with specific treatments for the complications, are necessary. Electronic supplementary material The online version of this article (doi:10.1186/s13256-017-1274-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Joo Seop Kim
- Division of Cardiology, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Seoul, South Korea
| | - Min-Kyung Kang
- Division of Cardiology, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Seoul, South Korea.
| | - A Jin Cho
- Division of Nephrology, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Seoul, South Korea
| | - Yu Bin Seo
- Division of Infection, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Seoul, South Korea
| | - Kun Il Kim
- Division of Cardiothoracic Surgery, Kangnam Sacred Heart Hospital, Hallym University Medical Center, Seoul, South Korea
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Malhotra A, Pawar SR, Srivastava A, Yadav BS, Kaushal R, Sharma P, Songra M. Clinical and hemodynamic study of tilting disc heart valve: Single-center study. Asian Cardiovasc Thorac Ann 2014; 22:519-25. [PMID: 24646514 DOI: 10.1177/0218492313475640] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The TTK Chitra heart valve has been developed and widely used in India. This study aimed to evaluate its hemodynamics, complications, and event-free survival in comparison with other commonly used prosthetic valves. The role of color Doppler echocardiography in the follow-up of patients with prosthetic valves was also studied. PATIENTS AND METHODS Two hundred patients underwent 249 valve replacements (122 mitral, 29 aortic, 49 both). Total follow-up was 451 patient-years. RESULTS There were 18 late deaths (3.98% ± 0.92% per patient-year). One mitral valve replacement patient (0.36% ± 0.36% per patient-year) developed valve thrombosis. Two aortic valve replacement patients (2.74% ± 1.91% per patient-year), 2 double-valve replacement patients (1.95% ± 1.36% per patient-year) and 3 mitral valve replacement patients (1.08% ± 0.62% per patient-year) developed embolic complications. Freedom from all valve related mortality and morbidity at 4 years was 86% ± 4% for mitral valve replacement, 56% ± 10% for double-valve replacement, and 89% ± 6% for aortic valve replacement. The average peak gradient, mean gradient, and average peak velocity for the aortic and mitral positions were found to be comparable to those of other commonly used valves. CONCLUSION The performance of this valve in terms of hemodynamic complications, mortality, and morbidity is comparable to other valves in common use. Hemodynamic gradients are more reproducible than effective orifice area, hence more beneficial for follow-up.
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Gadhinglajkar S, Namboodiri N, Pillai V, Sreedhar R. Double-Envelope Continuous-wave Doppler Flow Profile Across a Tilting-Disc Mitral Prosthesis: Intraoperative Significance. J Cardiothorac Vasc Anesth 2011; 25:491-4. [DOI: 10.1053/j.jvca.2010.03.008] [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] [Received: 01/17/2010] [Indexed: 11/11/2022]
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Hsu PC, Su HM, Lin TH, Huang JW, Lai WT, Sheu SH. Acute Type A Aortic Dissection Involving Right Coronary Artery Orifice in a Case Presenting with Anterior ST Elevation: A Rare Case Report. Cardiology 2011; 119:11-4. [DOI: 10.1159/000329516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Accepted: 05/15/2011] [Indexed: 11/19/2022]
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Garcia J, Sacristan E. Trileaflet valve hydrodynamic resistance assessment. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2008; 2008:1393-1396. [PMID: 19162928 DOI: 10.1109/iembs.2008.4649425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Valve hydrodynamic performance is usually assessed by effective orifice area, transvalvular resistance, regurgitation and blood damage effect. Some studies suggest effects in effective orifice area due to cardiovascular resistance, compliance and angle position of the valve. We suppose that silicone rubber valves under study have a good performance under different cardiovascular resistance conditions. Two in vitro experiments were made to test this hypothesis under constant and pulsatile flow rate. Transvalvular gradient pressure, transvalvular resistance, Gorling effective orifice area, effective orifice area in the ascending aorta and Reynolds numbers were estimated in both flow rates. Results suggest that cardiovascular resistance has no significant effect for this kind of valves, however resistance effect is observed in pumping pressure. Small transvalvular resistance and transvalvular pressure gradients were found. Gorlin effective orifice areas greater than 0.3 cm(2) have not viscosity effect. P-value 0.001 was found between Gorlin effective orifice area under constant and pulsatile flow rate.
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Affiliation(s)
- J Garcia
- Laval Hospital Research Center, Laval University, Quebec, Canada.
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