Case report: SARS-CoV-2 specific T-cells are associated with myocarditis after COVID-19 vaccination with mRNA-1273.

Vaccination of SARS-CoV-2 with BNT162b2 or mRNA-1273 both have a low incidence of induction of myocarditis. Here we report on utilizing adaptive immune receptor repertoire sequencing (AIRR-Seq) as a way to assess the specificity of tissue infiltrating immune cells.

Adenosine-sensitive decremental conduction over short non-decremental atrioventricular accessory pathways after radiofrequency ablation: case series.

Introduction: Decremental conduction in short anterograde atrioventricular accessory pathways (AV-APs) is rare.

Case Presentation: We report on two cases with radiofrequency (RF) ablation of anterograde fast non-decremental AV-AP conduction. In Case 1, electrophysiological testing revealed fast non-decremental conduction over an anterograde short right posteroseptal AV-AP.

A Retrograde Transaortic/Transmitral Approach for Radiofrequency Ablation of Adenosine-Sensitive Atrial Tachycardia Arising Near the Apex of Koch's Triangle: A Case Study Approach and Review of the Literature.

Atrial tachycardias (ATs) are relatively uncommon and their mechanisms include reentry or may be focal. The characteristics and radiofrequency (RF) ablation of adenosine-sensitive AT arising near the apex of Koch's triangle have been reported. We report a case of successful RF ablation of this tachycardia by using a retrograde transaortic/transmitral approach.

Segment-orientated analysis of two-dimensional strain and strain rate as assessed by velocity vector imaging in patients with acute myocardial infarction.

Aims: Strain rate imaging techniques have been proposed for the detection of ischemic or viable myocardium in coronary artery disease, which is still a challenge in clinical cardiology. This retrospective comparative study analyzed regional left ventricular function and scaring with two-dimensional strain (2DS) in the first 4 to 10 days after acute anterior myocardial infarction (AMI).

Methods And Results: The study population consisted of 32 AMI patients with an LAD occlusion and successful reperfusion.

Eighteen months follow-up of the clinical efficacy of the high density mesh ablator (HDMA) in patients with atrial fibrillation after pulmonary vein isolation.

Purpose: The high density mesh ablator (HDMA), a mesh electrode catheter using radiofrequency delivery for pulmonary vein isolation (PVI) in patients with atrial fibrillation (AF), has been shown to have a high acute ablation success rate. The primary endpoint of our study was the efficacy of HDMA to maintain sinus rhythm (SR), and the secondary endpoint is its efficacy to reduce AF burden in an 18-month follow-up.

Methods: Forty-two patients with AF [25 patients with paroxysmal AF (PAF, 59.

Contrast medium induced nephropathy in patients undergoing percutaneous coronary intervention for acute coronary syndrome: differences in STEMI and NSTEMI.

Unlabelled: The aim of this study was to assess the incidence, clinical predictors, and outcome of patients developing contrast medium induced nephropathy (CIN) after percutaneous coronary intervention (PCI) for acute coronary syndrome (ACS).

Background: CIN is associated with significant higher morbidity and mortality after coronary intervention. Recently it was shown, that patients undergoing percutaneous coronary intervention for acute myocardial infarction have a significant higher risk of developing CIN.

Prevalence of ventricular discordance and its relation to functional capacity in idiopathic dilated cardiomyopathy.

Introduction: Although left ventricular (LV) dilatation is the most distinguishing morphologic feature of idiopathic dilated cardiomyopathy (IDC), right ventricular (RV) dilatation may variably contribute to total cardiac enlargement. The prevalence and functional importance of the relative degree of left and right ventricular dilatation has not been comprehensively studied using cardiac magnetic resonance imaging (MRI).

Methods: Our prospective study included 58 consecutive IDC patients with a LV ejection fraction <40% and NYHA functional class > or =2.

Segmental pulmonary vein isolation in atrial fibrillation: new insights from the high density mesh mapper technique in an electrophysiologically guided approach.

Objective: As opposed to fundamental investigations into the nature of atrial fibrillation (AF) current clinical studies of AF ablation techniques sometimes only contain sparse information about the underlying electrophysiological properties. The purpose of this prospective, pilot study was to evaluate acute therapeutic success and clinical outcome after 6 month of segmental ostial ablation (SOA) using the High Density Mesh Mapper catheter (HDMM, BARD Electrophysiology, Lowell, MA, USA) for an electrophysiological guided approach. The HDMM is a novel, single expandable basket electrode catheter for high resolution recordings at the left atrium/pulmonary vein (PV) junction.

Massive pericarditis constrictiva calcarea with compression of the right ventricle and consecutive pulmonary embolism.

A 40-year-old man was admitted with a massive pericarditis constrictiva calcarea. Transthoracic and transoesophageal echocardiography demonstrated a double-layered pericardial calcification with interspacial effusion, a massive compression of the right ventricle, and a thrombus formation in the ventricle. In addition, severe pulmonary embolism due to this right ventricular thrombus formation was diagnosed by CT.

First experiences for pulmonary vein isolation with the high-density mesh ablator (HDMA): a novel mesh electrode catheter for both mapping and radiofrequency delivery in a single unit.

Background: Interventional therapy of atrial fibrillation (AF) is often associated with long examination and fluoroscopy times. The use of mapping catheters in addition to the ablation catheter requires multiple transseptal sheaths for left atrial access.

Objectives: The purpose of this prospective study was to evaluate feasibility and safety of pulmonary vein (PV) isolation using the high-density mesh ablator (HDMA), a novel single, expandable electrode catheter for both mapping and radiofrequency (RF) delivery at the left atrium/PV junctions.

Impact of irrigated energy application on the right coronary artery hemodynamics: FFR measurement in patients who underwent ablation of common type atrial flutter.

Objective: The purpose of this first in vivo study was to assess the incidence of thermal influence to the right coronary artery (RCA) during ablation of common type atrial flutter (Aflu) by measuring the fractional flow reserve (FFR) in the vessel before, under and after ablation.

Methods: In thirty three patients ablated we performed coronary angiography (CA) before and at the end of the procedure. The FFR wire was positioned in the distal, the isthmus underlying, part of the RCA.

Quality of life and occurrence of atrial fibrillation in long-term follow-up of common type atrial flutter ablation: ablation with irrigated 5 mm tip and conventional 8 mm tip electrodes.

Objectives: The ablation of common type atrial flutter is mainly performed by two approved techniques, whose efficacy and outcome in terms of quality of life have not been evaluated so far in a long-term follow-up study over years. A high proportion of patients suffer from coexistent atrial fibrillation, which may worsen the ablation result. The question arises whether one technique is more effective than the other when immediate ablation results, the occurrence of atrial fibrillation and the quality of life are compared.

[Inhibition of the muscarinic potassium current by KB130015, a new antiarrhythmic agent to treat atrial fibrillation].

Background And Purpose: Vagus-induced atrial fibrillation is of particular clinical interest. The muscarinic potassium current I(K(ACh)) mediates the induction of vagus-induced atrial fibrillation. Selective inhibition of I(K(ACh)) seems to be an option to treat atrial fibrillation.

From atherosclerotic coronary ectasia to aneurysm: a case report and literature review.

In contrast to Kawasaki syndrome the formation of coronary aneurysms caused by atherosclerosis has hardly been demonstrated. We report on a 56-year old patient, admitted to our hospital for cardiovascular evaluation before carotid surgery. He had no anginal pain, but a history of coronary artery disease with previous anterior myocardial infarction.

How reliable is electrocardiography in differentiating transmural from non-transmural myocardial infarction? A study with contrast magnetic resonance imaging as gold standard.

Cardiovascular magnetic resonance (CMR) using contrast enhancement allows exact determination of the site and transmural extent of myocardial infarction (MI). We evaluated whether 12-lead electrocardiography can differentiate transmural from non-transmural MI or determine the site of MI by comparing the findings with those of contrast-enhanced CMR. A total of 27 patients (59.

[Perspectives and limitations in the treatment of vagus-induced atrial fibrillation. Insights from cellular pharmacology].

Background And Purpose: Pharmacological treatment of atrial fibrillation (AF) is limited by induction of malignant ventricular arrhythmias. Developing new drugs, a promising strategy is a more specific treatment of the atria. Muscarinic potassium current (IK[ACh]) is predominantly expressed in supraventricular tissue and mediates the induction of vagus-induced AF.