The perfusion of the AV node artery in dog heart in vivo was performed. After destroying the sinoatrial node by selective injection of ethanol into the sinus node artery, the selective administration of catecholamines into the AV node artery induced acceleration of nodal rhythm. In the course of recovery, eminent oscillatory change in the AV nodal rhythm was regularly observed. This oscillatory...

Atrioventricular (AV) block and pseudoaneurysm of the mitral-aortic intervalvular fibrosa (P-MAIVF) are rare complications of infective endocarditis (IE). A 72-year-old man with severe aortic stenosis was hospitalized due to IE. After admission, intermittent AV block and P-MAIVF were noted. Interestingly, an accelerated junctional rhythm was observed during the process of AV block resolution. E...

2015 Ungefär 100 kilo ATP syntetiseras i kroppen varje dag av ATP-syntas, ett sammansatt proteinkomplex med tre aktiva centra. Komplexet sitter förankrat i ett biologiskt membran med hjälp av hydrofob attraktion och består av en roterande och en statisk del. En ATP-molekyl syntetiseras per tredjedels varv. Trots att varje aktivt centrum skulle kunna fungera oberoende av de andra, sparas mycket ...

PURPOSE Previous studies have investigated the effect of AV biofeedback on the external respiratory signal reproducibility. This is the first study investigating the effect of AV biofeedback to improve the motion reproducibility of the internal anatomy. The aim of the project is to test the hypothesis that AV biofeedback improves the diaphragm motion reproducibility. METHODS An AV biofeedback...

This document describes the methods that were used when implementing support vector machines for classification and stratification of children with acute lymphoblastic leukaemia (ALL), and the underlying variable interaction used by these machines during training. ALL stands for a third of all patients with cancer and is demonstrated with an overpopulation of immature Band T-lymphocytes (compon...

Drugs are considered a common reversible cause of rhythm conduction disorders. Atrio-ventricular (AV) block occurs more commonly following β-blocker or digitalis administration, but calcium channel blockers have also been linked to AV block [1,2] The cornerstone of management in drug-related AV block is to determine whether the AV block is truly reversible upon withdrawal of the culprit drug, h...

Recent work has shown that alterations in the dynamic atrioventricular (AV) nodal response to changes in heart rate can significantly modify AV nodal function. The present study was designed to evaluate the nature and potential importance of sympathetic regulation of the rate-dependent properties of the AV node. Selective stimulation protocols and mathematical formulations were used to independ...

Dessa övergripande frågor belyses i avhandlingen ’Health Promotion in Diabetes Care – studies on adult type 1 diabetes patients’ som försvarades av leg sjuksköterska Susanne Amsberg den 23 maj vid Karolinska Institutet, Institutionen för kliniska vetenskaper, Danderyds sjukhus, Stockholm. Avhandlingen omfattar även studier som belyser aspekter av injektionsteknik, där studien syftade till att u...

BACKGROUND AND OBJECTIVES The factors related to the progression of mild aortic stenosis (AS) remain unknown. We wanted to evaluate the long-term outcomes and predictors of echocardiographic progression in patients with mild AS. SUBJECTS AND METHODS We prospectively included 103 consecutive asymptomatic patients (62.1±11.9 years, 31 males) with mild AS. Mild AS was defined as aortic valve (AV...

AIMS Calcification is an independent predictor of mortality in aortic valve (AV) stenosis. Echocardiographic calibrated integrated backscatter (cIB) is a promising parameter for quantifying AV calcification. However, the ability of cIB to differentiate between calcification and valvular thickening has been questioned. Therefore, we aimed to use cIB to study AV calcification compared with non-ca...