Markedly varying PR intervals during second degree atrioventricular block: possible mechanisms
نویسندگان
چکیده
منابع مشابه
Second-degree atrioventricular block.
1) While it is possible only one type of second-degree AV block exists electrophysiologically, the available data do not justify such a conclusion and it would seem more appropriate to remain a "splitter," and advocate separation and definition of multiple mechanisms, than to be a "lumper," and embrace a unitary concept. 2) The clinical classification of type I and type II AV block, based on pr...
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Of 67 patients with reciprocal atrioventricular (A-V) nodal tachycardia consecutively studied by programmed electrical stimulation of the heart, nine patients showed second degree block toward the ventricle and one patient toward the atrium during tachycardia. In four patients the occurrence of block was critically related to the prematurity of the test stimulus initiating the tachycardia. In t...
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Sir, The important paper by Shaw et al (1985;53: 587-93) showed that elderly patients with persistent type I second degree heart block have a poor prognosis. They concluded that in the absence of special circumstances these patients should receive permanent pacemakers. Indications for pacemaker implantation have changed and we need to consider the findings of Shaw et al in the light of current ...
متن کاملSurvival in second degree atrioventricular block.
Two hundred and 14 patients with chronic second degree heart block were seen and followed up in the Devon Heart Block and Bradycardia Survey between 1968 and 1982. The patients were divided into three groups according to the type of block. In group 1 there were 77 patients with Mobitz type I block (mean age 69 years), in group 2, 86 patients with Mobitz type II block (mean age 74 years), and in...
متن کاملCatheter-induced 3:1 second degree atrioventricular nodal block during atrioventricular nodal reentrant tachycardia.
Second-degree atrioventricular (AV) nodal block with 2:1 AV conduction during atrioventricular nodal reentrant tachycardia (AVNRT) has been previously described. We report a patient who developed AVNRT during which 3:1 intra-infra-Hisian block due to catheter manipulation was observed. This was followed by gradual, incremental recovery of AV conduction. AVNRT accounts for approximately 50% of c...
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ژورنال
عنوان ژورنال: Indian Heart Journal
سال: 2012
ISSN: 0019-4832
DOI: 10.1016/s0019-4832(12)60097-2