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1.
Eur Heart J Suppl ; 22(Suppl M): M19-M25, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33664636

RESUMO

A therapeutic dilemma arises when infective endocarditis (IE) is complicated by a neurologic event. Postponement of surgery up to 4 weeks is recommended by the guidelines, however, this negatively impacts outcomes in many patients with an urgent indication for surgery due to uncontrolled infection, disease progression, or haemodynamic deterioration. The current literature is ambiguous regarding the safety of cardiopulmonary bypass in patients with recent neurologic injury. Nevertheless, most publications demonstrate a lower risk for secondary haemorrhagic conversion of uncomplicated ischaemic lesions than the risk for recurrent embolism under antibiotic treatment. Here, we discuss the current literature regarding neurologic stroke complicating IE with an indication for surgery.

2.
BMC Cardiovasc Disord ; 19(1): 302, 2019 12 19.
Artigo em Inglês | MEDLINE | ID: mdl-31881943

RESUMO

BACKGROUND: Endomyocardial fibrosis (EMF) represents the most common cause of restrictive cardiomyopathy worldwide. Despite a high prevalence in tropical regions, it occasionally occurs in patients who have never visited these areas. While researches have proposed various possible triggers for EMF, etiology and pathogenesis remain largely unknown. Diagnosis is based on patient history, heart failure symptoms, and echocardiographic signs of restrictive ventricular filling, atrioventricular valve regurgitation and frequently apical thrombus. Following is a case report of an Austrian patient with EMF who eventually had to undergo a heart transplant. This case report strives to promote awareness for this in non-tropical areas uncommon but nevertheless detrimental disease. CASE PRESENTATION: A 40-year-old woman was presented at our emergency department with chest pain and fever up to 38.1° Celsius. Plasma troponin-T levels and inflammatory markers were slightly elevated, but the echocardiogram was without pathological findings. The patient was hospitalized on the suspicion of acute myocarditis and discharged soon after improvement. Eight months later, she was presented again with chest pain and symptoms of heart failure. The echocardiogram showed normal systolic left ventricular (LV) function with LV wall thickening and severe restrictive mitral regurgitation as well as aortic and tricuspid regurgitation. Coronary angiogram was normal but right heart catheterization showed pulmonary hypertension due to left heart disease. Further diagnostic workup with cardiac magnetic resonance imaging revealed subendocardial late enhancement and apical thrombus formation in the left ventricle compatible with the diagnosis of EMF. A comprehensive diagnostic workup showed no evidence of infection, systemic immunologic or hematological disease, in particular hypereosinophilic syndrome. After a multidisciplinary consideration of several therapeutic options, the patient was listed for heart transplantation. On the waiting list, she deteriorated rapidly due to progressive heart failure and finally underwent a heart transplantation. Histological examination confirmed the diagnosis of EMF. Six years after her heart transplantation, the patient was presented in an excellent clinical condition. CONCLUSIONS: Even in non-tropical regions, the diagnosis of EMF should always be considered in restrictive cardiomyopathy. Knowledge of the distinct phenotype of EMF facilitates diagnosis, but comprehensive workup and therapeutic management remain challenging and require a multidisciplinary approach.


Assuntos
Fibrose Endomiocárdica/cirurgia , Insuficiência Cardíaca/cirurgia , Transplante de Coração , Miocárdio/patologia , Adulto , Áustria , Progressão da Doença , Fibrose Endomiocárdica/diagnóstico por imagem , Fibrose Endomiocárdica/patologia , Fibrose Endomiocárdica/fisiopatologia , Feminino , Insuficiência Cardíaca/diagnóstico por imagem , Insuficiência Cardíaca/patologia , Insuficiência Cardíaca/fisiopatologia , Humanos , Recuperação de Função Fisiológica , Fatores de Tempo , Resultado do Tratamento , Listas de Espera
3.
Eur J Cardiothorac Surg ; 65(6)2024 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-38781502

RESUMO

OBJECTIVES: Barlow's disease is a specific sub-form of mitral valve (MV) disease, characterized by diffuse excessive tissue and multi segment prolapse. The anterolateral mini-thoracotomy represents the standard access for MV regurgitation in many centres. It still remains unclear which surgical technique provides the best results. Therefore, the aim of this study was to compare operative safety and mid-term outcomes after (i) isolated annuloplasty, (ii) use of additional artificial chordae or (iii) leaflet resection in patients suffering from Barlow's disease undergoing minimally invasive MV repair. METHODS: A consecutive series of patients suffering from Barlow's disease undergoing minimally invasive MV surgery between 2001 and 2020 were analysed (n = 246). Patients were grouped and analysed according to the used surgical technique. The primary outcome was a modified Mitral Valve Academic Research Consortium combined end-point of mortality, reoperation due to repair failure or reoccurrence of severe mitral regurgitation within 5 years. The secondary outcome included operative success and safety up to 30 days. RESULTS: No significant difference was found between the 3 surgical techniques with regard to operative safety (P = 0.774). The primary outcome did not differ between groups (P = 0.244). Operative success was achieved in 93.5% and was lowest in the isolated annuloplasty group (77.1%). Conversion to MV replacement was increased in patients undergoing isolated annuloplasty (P < 0.001). CONCLUSIONS: Isolated annuloplasty, use of additional artificial chordae and leaflet resection represent feasible techniques in Barlow patients undergoing minimally invasive MV surgery with comparable 5-year results. In view of the increased conversion rate in the annuloplasty group, the pathology should not be oversimplified.


Assuntos
Procedimentos Cirúrgicos Minimamente Invasivos , Anuloplastia da Valva Mitral , Prolapso da Valva Mitral , Valva Mitral , Humanos , Feminino , Masculino , Prolapso da Valva Mitral/cirurgia , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Pessoa de Meia-Idade , Valva Mitral/cirurgia , Anuloplastia da Valva Mitral/métodos , Anuloplastia da Valva Mitral/efeitos adversos , Resultado do Tratamento , Estudos Retrospectivos , Insuficiência da Valva Mitral/cirurgia , Idoso , Adulto , Implante de Prótese de Valva Cardíaca/métodos , Implante de Prótese de Valva Cardíaca/mortalidade , Implante de Prótese de Valva Cardíaca/efeitos adversos
4.
J Heart Valve Dis ; 22(5): 665-8, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-24383378

RESUMO

BACKGROUND AND AIM OF THE STUDY: Mitral valve surgery after previous cardiac surgery is technically demanding and risky. In patients after coronary artery bypass grafting (CABG), mitral valve surgery is associated with a high risk of injury to the bypass graft with concomitant myocardial ischemia. An aortic valve prosthesis usually severely impairs access to the mitral valve, so that these patients are often denied surgery. Furthermore, patients with porcelain aorta may be inoperable. METHODS: A series of 10 patients undergoing minimally invasive mitral valve repair via a right-sided anterolateral minithoracotomy without aortic cross-clamping on the fibrillating heart was investigated. Four patients had an aortic valve prosthesis in situ, six patients had undergone previous CABG, and two patients presented with porcelain aorta. RESULTS: Reconstruction was possible in nine patients. Cannulation was performed femorally in three patients, and via the axillary artery in seven patients. No fatalities were observed. One patient required rethoracotomy for bleeding and subsequently developed a right-sided pneumonia, and a second patient experienced lower-limb ischemia. The postoperative course of the other eight patients was uneventful. No patient presented with significant residual mitral insufficiency at control echocardiography. CONCLUSION: Minimally invasive mitral valve reconstruction via a right-sided minithoracotomy represents an attractive surgical option in a high-risk reoperative setting.


Assuntos
Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Insuficiência da Valva Mitral/cirurgia , Valva Mitral/cirurgia , Toracotomia/métodos , Fibrilação Ventricular/complicações , Idoso , Ponte de Artéria Coronária , Ecocardiografia , Feminino , Seguimentos , Próteses Valvulares Cardíacas , Humanos , Masculino , Insuficiência da Valva Mitral/complicações , Insuficiência da Valva Mitral/diagnóstico por imagem , Fatores de Risco , Resultado do Tratamento
5.
Artigo em Inglês | MEDLINE | ID: mdl-36866493

RESUMO

OBJECTIVES: Minimally invasive mitral valve surgery (MIMVS) has evolved over the last 2 decades. The aim of the study was to identify the impact of era and technical improvements on perioperative outcome after MIMVS. METHODS: A tota of 1000 patients (mean age: 60.8 ± 12.7 years, 60.3% male) underwent video-assisted or totally endoscopic MIMVS between 2001 and 2020 in a single institution. Three technical modalities were introduced during the observed period: (i) 3D visualization, (ii) use of premeasured artificial chordae (PTFE loops) and (iii) preoperative CT scans. Comparisons were made before and after the introduction of technical improvements. RESULTS: A total of 741 patients underwent isolated mitral valve (MV) procedure, whereas 259 received concomitant procedures. These consisted of tricuspid valve repair (208), left atrium ablation (145) and persistent foramen ovale or atrial septum defect (ASD) closure (172). The aetiology was degenerative in 738 (73.8%) patients and functional in 101 patients (10.1%). A total of 900 patients received MV repair (90%), and 100 patients (10%) underwent MV replacement. Perioperative survival was 99.1%, and periprocedural success 93.5% with a periprocedural safety of 96.3%. Improvement in periprocedural safety attributed to the lower rates of postoperative low output (P = 0.025) and less reoperations for bleeding (P < 0.001). 3D visualization improved cross-clamp (P = 0.001) but not cardiopulmonary bypass times. The use of loops and preoperative CT scan both had no impact on periprocedural success or safety but improved cardiopulmonary bypass and cross-clamp times (both P < 0.001). CONCLUSIONS: Increased surgical experience improves safety in MIMVS. Technical improvements are related to increased operative success and decreased operative times in patients undergoing MIMVS.

6.
Interact Cardiovasc Thorac Surg ; 34(3): 361-368, 2022 02 21.
Artigo em Inglês | MEDLINE | ID: mdl-34871383

RESUMO

OBJECTIVES: Surgical treatment of destructive infective endocarditis consists of extensive debridement followed by root repair or replacement. However, it remains unknown whether 1 is superior to the other. We aimed to analyse whether long-term results were better after root repair or replacement in patients with root endocarditis. METHODS: A total of 148 consecutive patients with root endocarditis treated with surgery from 1997 to 2020 at our department were included. Patients were divided into 2 groups: aortic root repair (n = 85) or root replacement using xenografts or homografts (n = 63). RESULTS: Patients receiving aortic root repair showed significantly better long-term survival compared to patients receiving aortic root replacement (log-rank: P = 0.037). There was no difference in terms of freedom from valvular reoperations among both treatment groups (log-rank: P = 0.58). Patients with aortic root repair showed higher freedom from recurrent endocarditis compared to patients with aortic root replacement (log-rank: P = 0.022). Patients with aortic root repair exhibited higher event-free survival (defined as a combination end point of freedom from death, valvular reoperation or recurrent endocarditis) compared to patients receiving aortic root replacement (log-rank: P = 0.022). Age increased the risk of mortality with 1.7% per year. Multi-variable adjusted statistical analysis revealed improved long-term event-free survival after aortic root repair (hazards ratio: 0.57, 95% confidence interval: 0.39-0.95; P = 0.031). CONCLUSIONS: Aortic root repair and replacement are feasible options for the surgical treatment of root endocarditis and are complementary methods, depending on the extent of infection. Patients with less advanced infection have a more favourable prognosis. CLINICAL TRIAL REGISTRATION: UN4232 382/3.1 (retrospective study).


Assuntos
Endocardite Bacteriana , Endocardite , Implante de Prótese de Valva Cardíaca , Próteses Valvulares Cardíacas , Abscesso/diagnóstico por imagem , Abscesso/etiologia , Abscesso/cirurgia , Valva Aórtica/diagnóstico por imagem , Valva Aórtica/cirurgia , Endocardite/etiologia , Endocardite Bacteriana/etiologia , Implante de Prótese de Valva Cardíaca/efeitos adversos , Humanos , Reoperação , Estudos Retrospectivos
7.
Carcinogenesis ; 32(4): 636-42, 2011 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-21297112

RESUMO

BACKGROUND AND AIMS: Tumor suppressor genes are often located in frequently deleted chromosomal regions of colorectal cancers (CRCs). In contrast to microsatellite stable (MSS) tumors, only few loss of heterozygosity (LOH) studies were performed in microsatellite instable (MSI) tumors, because MSI carcinomas are generally considered to be chromosomally stable and classical LOH studies are not feasible due to MSI. The single nucleotide polymorphism (SNP) array technique enables LOH studies also in MSI CRC. The aim of our study was to analyse tissue from MSI and MSS CRC for the existence of (frequently) deleted chromosomal regions and tumor suppressor genes located therein. METHODS AND RESULTS: We analyzed tissues from 32 sporadic CRCs and their corresponding normal mucosa (16 MSS and 16 MSI tumors) by means of 50K SNP array analysis. MSS tumors displayed chromosomal instability that resulted in multiple deleted (LOH) and amplified regions and led to the identification of MTUS1 (8p22) as a candidate tumor suppressor gene in this region. Although the MSI tumors were chromosomally stable, we found several copy neutral LOHs (cnLOH) in the MSI tumors; these appear to be instrumental in the inactivation of the tumor suppressor gene hMLH1 and a gene located in chromosomal region 6pter-p22. DISCUSSION: Our results suggest that in addition to classical LOH, cnLOH is an important mutational event in relation to the carcinogenesis of MSS and MSI tumors, causing the inactivation of a tumor suppressor gene without copy number alteration of the respective region; this is crucial for the development of MSI tumors and for some chromosomal regions in MSS tumors.


Assuntos
Instabilidade Cromossômica , Neoplasias Colorretais/genética , Perda de Heterozigosidade , Instabilidade de Microssatélites , Proteínas Adaptadoras de Transdução de Sinal/análise , Proteínas Adaptadoras de Transdução de Sinal/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Proteína 1 Homóloga a MutL , Proteínas Nucleares/análise , Proteínas Nucleares/genética , Polimorfismo de Nucleotídeo Único , Proteínas Supressoras de Tumor/análise , Proteínas Supressoras de Tumor/genética
8.
J Heart Valve Dis ; 20(5): 593-5, 2011 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22066367

RESUMO

Since aortic root reoperations are challenging procedures, alternative lower-risk procedures should be considered in certain cases. Herein are presented two different approaches to high-risk root reoperations. The first patient, a 59-year-old male who had undergone root replacement 11 years previously with an Edwards Prima stentless valve, presented with severe aortic regurgitation and a heavily calcified aortic root. An open implantation of an Edwards Sapien valve was performed via an aortotomy distal to the calcified aortic root. The second patient, a 60-year-old female, underwent transapical implantation of an Edwards Sapien transcatheter valve for stenosis of the aortic valve in an aortic homograft implanted 11 years previously. The long-term durability of these implants has yet to be evaluated.


Assuntos
Insuficiência da Valva Aórtica/cirurgia , Estenose da Valva Aórtica/cirurgia , Procedimentos Cirúrgicos Cardíacos/métodos , Implante de Prótese de Valva Cardíaca/métodos , Próteses Valvulares Cardíacas , Estenose da Valva Aórtica/diagnóstico por imagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Reoperação , Esclerose , Tomografia Computadorizada por Raios X , Transplante Homólogo
9.
Eur Heart J Case Rep ; 5(7): ytab237, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34240003

RESUMO

BACKGROUND: Primary pericardial mesothelioma (PPM) is a rare form of highly aggressive cancer. Many patients are diagnosed only at an advanced stage. Therefore, the overall survival rate is poor with a median survival of 3 months. In some rare cases, the PPM infiltrates the myocardium causing lethal myocardial dysfunction. CASE SUMMARY: A 66-year-old patient was transferred to our centre with the provisional diagnose of pericarditis of unknown origin. Using extensive cardiac imaging [echocardiography, computed tomography (CT), positron emission tomography-CT, cardiac magnetic resonance imaging, left and right heart catheterization, coronary angiography], PPM was finally diagnosed. After consultation with the oncologists, the heart team decided to resect the tumour first due to impaired haemodynamics and then initiate adjuvant chemotherapy. Intraoperatively, myocardial infiltration of the tumour became apparent, which was not detected preoperatively despite intensive imaging. Complete resection of the PPM was not possible and effective decompression of the ventricle could not be achieved. The patient died on the first postoperative day. DISCUSSION: Surgical therapy is indicated in many forms of cardiac tumours. However, when a tumour invades the myocardium, surgery often comes to its limits. In this case, myocardial invasion of PPM could not be detected despite extensive imaging. We therefore suggest that possible myocardial infiltration by PPM, and thus potential limitations of cardiac surgery, should be considered independently of imaging results when therapeutic options are discussed.

10.
Ann Thorac Surg ; 110(6): e517-e519, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32442620

RESUMO

Remote access perfusion for minimally invasive mitral surgery is commonly achieved by femorofemoral bypass. We describe the use of the carotid artery as an inflow in 2 patients with severe calcifications of the abdominal aorta and the iliac arteries who underwent minimally invasive mitral and tricuspid valve repair. The easy and fast access to the vessel and the lack of interference with the transthoracic clamp and scope are the major advantages of carotid artery compared with other alternatives such as the axillary artery. We propose this technique in candidates for minimally invasive valve procedures with contraindications to femoral perfusion.


Assuntos
Insuficiência da Valva Mitral/cirurgia , Insuficiência da Valva Tricúspide/cirurgia , Idoso de 80 Anos ou mais , Procedimentos Cirúrgicos Cardíacos/métodos , Cateterismo , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Minimamente Invasivos
11.
Eur J Cardiothorac Surg ; 58(6): 1161-1167, 2020 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-33057727

RESUMO

OBJECTIVES: A treatment dilemma arises when surgery is indicated in patients with infective endocarditis (IE) complicated by stroke. Neurologists recommend surgery to be postponed for at least 1 month. This study aims to investigate the neurological complication rate and neurological recovery potential in patients with IE-related stroke. METHODS: A total of 440 consecutive patients with left-sided IE undergoing surgery were investigated. During follow-up, neurological recovery was assessed using the modified Rankin scale and the Barthel index. Mortality was assessed with regression models adjusting for age. RESULTS: The median follow-up time was 9.0 years. Patients with previous strokes were more likely to suffer from mitral valve endocarditis (29.5% vs 47.4%, P < 0.001). Symptomatic stroke was found in 135 (30.7%) patients; of them, 42 patients presented with complicated stroke (additional meningitis, haemorrhagic stroke or intracranial abscess). Driven by symptomatic stroke, the age-adjusted hospital mortality risk was 1.4-fold [95% confidence interval (CI) 0.74-2.57; P = 0.31] higher and the long-term mortality risk was 1.4-fold higher (95% CI 1.003-2.001; P = 0.048). Hospital mortality was higher in patients with complicated stroke (21.4% vs 9.7%; P = 0.06) only; however, mortality rates were similar comparing uncomplicated stroke versus no stroke. Among patients with complicated ischaemic strokes, the observed risk for intraoperative cerebral haemorrhage was 2.3% only and the increased hospital mortality was not driven by cerebral complications. In the long-term follow-up, full neurological recovery was observed in 84 out of 118 survivors (71.2%), and partial recovery was observed in 32 (27.1%) patients. Neurological recovery was lower in patients with complete middle cerebral artery stroke compared to other localization (52.9% vs 77.6%; P = 0.003). CONCLUSIONS: Contrary to current clinical practice and neurological recommendations, early surgery in IE is safe and neurological recovery is excellent among patients with IE-related stroke. CLINICAL REGISTRATION NUMBER LOCAL IRB: UN4232 382/3.1 (retrospective study).


Assuntos
Procedimentos Cirúrgicos Cardíacos , Endocardite , Acidente Vascular Cerebral , Procedimentos Cirúrgicos Cardíacos/efeitos adversos , Contraindicações , Endocardite/complicações , Endocardite/cirurgia , Humanos , Estudos Retrospectivos , Acidente Vascular Cerebral/epidemiologia , Acidente Vascular Cerebral/etiologia , Resultado do Tratamento
12.
Echocardiography ; 25(6): 624-31, 2008 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-18652008

RESUMO

BACKGROUND: This study sought to compare three-dimensional (3D) and two-dimensional (2D) transesophageal echocardiography (TEE) to assess intracardiac masses. It was hypothesized that 3D TEE would reveal incremental information for surgical and nonsurgical management. METHODS: In 41 patients presenting with intracardiac masses (17 thrombi, 15 myxomas, 2 lymphomas, 2 caseous calcifications of the mitral valve and one each of hypernephroma, hepatocellular carcinoma, rhabdomyosarcoma, lipoma, and fibroelastoma), 2D and 3D TEE were performed, aiming to assess the surface characteristics of the lesions, their relationship to surrounding structures, and attachments. Diagnoses were made by histopathology (n = 28), by computed tomography (n = 8), or by magnetic resonance imaging (n = 5). Benefit was categorized as follows: (A) New information obtained through 3D TEE; (B) helpful unique views but no additional findings compared to 2D TEE; (C) results equivalent to 2D TEE; (D) 3D TEE missed 2D findings. RESULTS: In 15 subjects (37%), 3D TEE revealed one or more items of additional information (category A) regarding type and site of attachment (n = 9, 22%), surface features (n = 6, 15%), and spatial relationship to surrounding structures (n = 8, 20%). In at least 18% of all intracardiac masses, 3D TEE can be expected to deliver supplementary information. In six patients, additional findings led to decisions deviating from those made on the basis of 2D TEE. In 11 subjects (27%), 3D echocardiographic findings were categorized as "B." CONCLUSIONS: Information revealed by 3D imaging facilitates therapeutic decision making and especially the choice of an optimal surgical access prior to removal of intracardiac masses.


Assuntos
Calcinose/diagnóstico por imagem , Ecocardiografia Tridimensional/métodos , Ecocardiografia Transesofagiana/métodos , Neoplasias Cardíacas/diagnóstico por imagem , Aumento da Imagem/métodos , Calcinose/cirurgia , Feminino , Neoplasias Cardíacas/cirurgia , Humanos , Masculino , Cuidados Pré-Operatórios/métodos , Prognóstico , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
14.
Artigo em Inglês | MEDLINE | ID: mdl-29485772

RESUMO

Bioprosthetic aortic valves have been used with increasing frequency over the past two decades, often in relatively young patients who may eventually require aortic valve re-operations due to degeneration of the bioprosthesis. Growing experience with minimally invasive aortic valve replacement has prompted surgeons to use minimally invasive approaches also with redo operations for replacement of the aortic valve.  This tutorial describes the operative steps for a minimally invasive redo replacement of the aortic valve through an upper ministernotomy. We demonstrate the surgical access, initiation of cardiopulmonary bypass, venting, and cardioplegia strategies. Special situations, such as how to approach patent coronary grafts, the small aortic annulus, and the use of sutureless or rapid deployment valves are demonstrated and discussed. The tutorial shows that minimally invasive redo aortic valve replacement is a safe, effective, and reproducible procedure.


Assuntos
Valva Aórtica/cirurgia , Implante de Prótese de Valva Cardíaca/métodos , Próteses Valvulares Cardíacas , Idoso , Bioprótese , Feminino , Humanos , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Reoperação
15.
Innovations (Phila) ; 13(2): 104-107, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29677020

RESUMO

OBJECTIVE: Inadequate peripheral venous drainage during minimally invasive cardiac surgery (MICS) is a challenge and cannot always be solved with increased vacuum or increased centrifugal pump speed. The present study was designed to assess the benefit of virtually wall-less transfemoral venous cannulas during MICS. METHODS: Transfemoral venous cannulation with virtually wall-less cannulas (3/8″ 24F 530-630-mm ST) was performed in 10 consecutive patients (59 ± 10 years, 8 males, 2 females) undergoing MICS for mitral (6), aortic (3), and other (4) procedures (combinations possible). Before transfemoral insertion of wall-less cannulas, a guidewire was positioned in the superior vena cava under echocardiographic control. The wall-less cannula was then fed over the wire and connected to a minimal extracorporeal system. Vacuum assist was used to reach a target flow of 2.4 l/min per m with augmented venous drainage at less than -80 mm Hg. RESULTS: Wall-less venous cannulas measuring either 630 mm (n = 8) in length or 530 mm (n = 2) were successfully implanted in all patients. For a body size of 173 ± 11 cm and a body weight of 78 ± 26 kg, the calculated body surface area was 1.94 ± 0.32 m. As a result, the estimated target flow was 4.66 ± 0.78 l/min, whereas the achieved flow accounted for 4.98 ± 0.69 l/min (107% of target) at a vacuum level of 21.3 ± 16.4 mm Hg. Excellent exposure and "dry" intracardiac surgical field resulted. CONCLUSIONS: The performance of virtually wall-less venous cannulas designed for augmented peripheral venous drainage was tested in MICS and provided excellent flows at minimal vacuum levels, confirming an increased performance over traditional thin wall cannulas. Superior results can be expected for routine use.


Assuntos
Cânula/normas , Procedimentos Cirúrgicos Cardíacos/instrumentação , Ponte Cardiopulmonar/instrumentação , Drenagem/instrumentação , Procedimentos Cirúrgicos Minimamente Invasivos/instrumentação , Idoso , Cânula/estatística & dados numéricos , Ponte Cardiopulmonar/métodos , Cateterismo , Drenagem/métodos , Ecocardiografia , Desenho de Equipamento , Feminino , Veia Femoral/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Minimamente Invasivos/métodos , Vácuo , Veia Cava Superior/cirurgia
16.
Artigo em Inglês | MEDLINE | ID: mdl-30480387

RESUMO

Transcatheter treatment of structural heart disease is becoming an everyday reality for an increasing number of surgeons, and effective training modalities for basic guide-wire skills, catheter handling, and periprocedural imaging are of growing relevance. In this video tutorial we present a beating-heart porcine model used as a high-fidelity training simulator for transcatheter cardiac valve procedures.  We demonstrate a complete transcatheter edge-to-edge mitral valve repair procedure, including periprocedural imaging, clip deployment, and quality control. Various mitral valve pathologies can be simulated, including the demonstrated leaflet prolapse. Trainees practice clip navigation within the left atrium, transmitral passage, and clip orientation as well as grasping mitral valve leaflets to treat mitral regurgitation.  Periprocedural imaging is achieved via epicardial echocardiography and left ventricular cardioscopy, and these imaging modalities are also relied on to guide surgeons during the simulations, as required. The beating heart model enables realistic demonstration of the hemodynamic consequences of valve repair, and we believe that this simulator represents a valuable adjunct to surgical training.


Assuntos
Cateterismo Cardíaco/métodos , Procedimentos Cirúrgicos Cardíacos/métodos , Simulação por Computador , Insuficiência da Valva Mitral/cirurgia , Valva Mitral/cirurgia , Cirurgia Torácica/educação , Animais , Modelos Animais de Doenças , Ecocardiografia , Valva Mitral/diagnóstico por imagem , Insuficiência da Valva Mitral/diagnóstico , Suínos
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