Landiolol for refractory tachyarrhythmias in the intensive care unit: case reports.

Tachyarrhythmias are common complications of critically ill patients treated on intensive care units. Landiolol is an ultra-short acting beta-blocker with a very high beta1-selectivity. Therefore, landiolol effectively reduces heart rate with only minimal negative effects on blood pressure and inotropy.

Bioimpedance Spectroscopy Reveals Important Association of Fluid Status and T -Mapping by Cardiovascular Magnetic Resonance.

Background: Extracellular matrix expansion is a key pathophysiologic feature in heart failure and can be quantified noninvasively by cardiac magnetic resonance T -mapping. Free water within the interstitial space of the myocardium, however, may also alter T -mapping results.

Purpose: To investigate the association between systemic fluid status and T -mapping by cardiac magnetic resonance.

Atrial arrhythmias following surgical AF ablation: electrophysiological findings, ablation strategies, and clinical outcome.

Background: Intraoperative atrial fibrillation (AF) ablation during cardiac surgery is a well-established treatment. However, tachycardia mechanisms, ablation strategies, and long-term follow-up of atrial arrhythmias (AA) following intraoperative AF ablation (AFA) have not been previously studied in a large cohort of patients.

Objective: Eighty-two patients (48 male, median age of 65 years) with symptomatic recurrence of AA following intraoperative AFA underwent radiofrequency catheter ablation.

Role of the coronary sinus ostium musculature in reentrant formation.

Background: Radiofrequency ablation of focal atrial tachycardias (AT) is a validated technique with high success rates. However, electrophysiological (EP) characteristics and ablation strategy of localized reentrant AT originating from the coronary sinus ostium (CSo) have not been reported in detail so far.

Methods: From January 2009 to July 2010, 1,453 patients underwent clinically motivated EP studies.

Two completely separated arrhythmias in one single heart chamber.

A 61-year-old male patient underwent an electrophysiological study and ablation for symptomatic atypical atrial flutter which was most likely related to previous intraoperative cryoablation for treatment of paroxysmal atrial fibrillation during open heart surgery. During the procedure, a tachycardia was induced in the electrically isolated left inferior pulmonary vein (PV). With the routine induction protocol, perimitral flutter was induced, whereas, independently, the PV tachycardia was still maintained.