Project description:The interatrial septum is a structure with complex embryological development. The true atrial septum is a circumscribed structure, and transgression outside of this area during transseptal puncture may result in entry into the extracardiac space or aorta that may result in a pericardial effusion or cardiac tamponade. (Level of Difficulty: Intermediate.).
Project description:BackgroundRecently, intracardiac echocardiography emerged as a useful tool in the electrophysiology laboratories for guiding transseptal left heart catheterizations, for avoiding thromboembolic and mechanical complications and assessing the ablation lesions characteristics. Although the value of ICE is well known, it is not a universal tool for achieving uncomplicated access to the left atrium. We present a case in which ICE led to interruption of a transseptal procedure because several risk factors for mechanical complications were revealed.Case presentationA case of a patient with paroxysmal atrial fibrillation and atrial flutter, and distorted intracardiac anatomy is presented. Intracardiac echocardiography showed a small oval fossa abouting to an enlarged aorta anteriorly. A very small distance from the interatrial septum to the left atrial free wall was seen. The latter two conditions were predisposing to a complicated transseptal puncture. According to fluoroscopy the transseptal needle had a correct position, but the intracardiac echo image showed that it was actually pointing towards the aortic root and most importantly, that it was virtually impossible to stabilize it in the fossa itself. Based on intracardiac echo findings a decision was made to limit the procedure only to ablation of the cavotricuspid isthmus and not to proceed further so as to avoid complications.ConclusionThis case report illustrates the usefulness of the intracardiac echocardiography in preventing serious or even fatal complications in transseptal procedures when the cardiac anatomy is unusual or distorted. It also helps to understand the possible mechanisms of mechanical complications in cases where fluoroscopic images are apparently normal.
Project description:BackgroundIn the era of fluoroless catheter ablation (CA), achieving a successful transseptal puncture (TSP) presents a significant challenge. We introduce a novel technique for zero-fluoroscopy and cost-effective needle-free TSP.Case summaryWe describe two cases where a GMS-1 guidewire (0.025 inch, pigtail configuration; Toray Medical Co., Ltd., Japan) was utilized for TSP. This technique was performed using either fluoroscopy or intracardiac echocardiography (ICE). The procedure was completed successfully in both cases, with no complications reported.ConclusionThe use of a 0.025 inch GMS-1 guidewire with an electrocautery technique enables effective transseptal puncture without the need for a needle or fluoroscopy. This novel approach offers a safe, efficient, and zero-fluoroscopic alternative for TSP.
Project description:BackgroundThe non-fluoroscopy approach with the use of a three-dimensional (3D) navigation system is increasingly recognized as a future technology in the treatment of arrhythmias. However, there are a limited number of articles published concerning transseptal puncture without the use of fluoroscopy.MethodsPresented in this paper is the first series of patients (n = 10) that have undergone transseptal puncture without the use of fluoroscopy under transesophageal echocardiography control using a radiofrequency transseptal needle and a 3D navigation system.ResultsAll patients were treated without complications. In 6 patients, re-pulmonary vein isolation was performed. In 5 cases, linear ablation of the left atrium for treatment of left atrial macro re-entry tachycardia was provided. In 2 patients, focal atrial tachycardia was treated, 1 patient underwent cavo tricuspidal isthmus (CTI) ablation and 1 patient, re-CTI ablation. The ablation of complex fragmented atrial electrograms was done in 2 patients. In 1 case, right atrial macro re-entry tachycardia was treated.ConclusionsTransseptal puncture without using fluoroscopy is safe and effective when using a radiofrequency needle, a 3D navigation system and transesophageal echocardiography.
Project description:Background: Transseptal puncture (TSP) is a critical step in electrophysiological (EP) procedures, as a misdirected TSP can result in life-threatening complications. Although TSP is predominantly performed under fluoroscopic guidance in EP procedures, transesophageal echocardiography (TEE) offers more precision and certainty in the localization of the transseptal needle at the interatrial septum. Despite the widespread use of TSP, evidence supporting the added value of TEE-guided TSP in EP procedures remains limited. This study evaluates the impact of additional TEE guidance on TSP-associated complications during EP procedures. Methods: This study enrolled patients who underwent left atrial or left ventricular procedures with TSP, performed either without (fluoroscopy group) or with additional TEE guidance (TEE group), at the University Heart Center Ulm, Germany. Results: A total of 932 patients were included: 443 in the TEE group (mean age 68.1 ± 11.8 years, 40.6% female) and 489 in the fluoroscopy group (mean age 68.8 ± 11.0 years, 38.2% female). The mean number of transseptal accesses per patient was 1.18 ± 0.38 in the TEE group and 1.14 ± 0.34 in the fluoroscopy group (p = 0.101). Pericardial tamponade occurred significantly less in the TEE group (0.5%) than in the fluoroscopy group (1.8%; p = 0.046). Logistic regression revealed a 91.8% lower risk of pericardial tamponade with TEE-guided TSP compared to fluoroscopy guidance alone. The overall TEE complication rate was low (0.9%). Conclusions: TEE guidance during TSP significantly reduces the risk of pericardial tamponade in EP procedures, indicating that TSP should be performed with additional sonographic guidance to increase patient safety.
Project description:Transseptal puncture (TSP) is performed to access the left side of the heart from the venous circulation. Performed under fluoroscopy with echocardiographic guidance, it is a procedure associated with complications. Pneumopericardium leading to cardiac tamponade is rare following TSP. We present 3 cases of pneumopericardium during TSP and its identification, probable mechanism, and management. (Level of Difficulty: Advanced.).
Project description:BackgroundAn inferoposterior transseptal puncture (TSP) is generally recommended for percutaneous left atrial appendage (LAA) closure. However, the LAA is a highly variable anatomical structure. This may have an impact on the preferred TSP site.AimsThis study aimed to determine the optimal TSP site for percutaneous LAA closure in different LAA morphologies.MethodsIn this prospective study, 182 patients undergoing percutaneous LAA closure were included. The spatial relationship of the LAA to the fossa ovalis and its consequence for TSP was assessed at preprocedural cardiac computed tomography (CCT).ResultsBased on CCT analysis, it was predicted that coaxial alignment between the delivery sheath and the LAA would be obtained by an inferoposterior, inferocentral, or inferoanterior TSP in 75%, 16% and 8% of cases, respectively. This was also confirmed by procedural LAA angiogram in 175 cases (96%) with <30° angle between the delivery sheath and the LAA central axis. Multivariate logistic regression analysis identified reverse chicken wing LAA (odds ratio [OR] 6.36 [1.85-29.3]; p=0.005) and posterior bending of the proximal LAA (OR 17.2 [3.3-96.2]; p<0.001) as independent predictors of a central or anterior TSP - this to increase the chance of obtaining coaxial alignment between the delivery sheath and the LAA.ConclusionsAn inferoposterior TSP is recommended in the majority of percutaneous LAA closure procedures in order to obtain coaxial alignment between the delivery sheath and the LAA. An inferior but more central/anterior TSP should be recommended in case of a reverse chicken wing LAA or posterior bending of the proximal LAA, which occurs in 20-25% of cases.