METHODS Ten patients (70% men; median age: 38 years [range: 34 to 45 years]) with drug-refractory premature ventricular contractions or ventricular tachycardia underwent catheter cryoablation. VAs were localized using 3-dimensional (3D) mapping, multidetector computed tomography, and intracardiac echocardiography, with arrhythmia foci being mapped at either the anterolateral PM or posteromedial...

The spatial distribution and depth of permafrost are changing in response to warming landscape disturbance across northern Arctic boreal regions. This alters the infiltration, flow, surface subsurface distribution, hydrologic connectivity inland waters. Such changes water cycle consequently alter source, transport, biogeochemical cycling aquatic carbon (C), its role production emission greenhou...