Effects of atrial pacing on atrio-sinus conduction and overdrive suppression in the isolated rabbit sinus node.
نویسندگان
چکیده
vascular response to endotoxin in intact dogs. Surgery. 73: 246-255 Puig-Muset P, Puig-Parellada P, Martin-Esteve J (1972) Biochemical and Pharmacological Aspects of Imidazole. Barcelona, Spain, published by the authors, pp 99-101 Samuelsson B, Goldyne M, Granstrom E, Hamberg M, Hammarstrom S, Malmsten C (1978) Prostaglandins and thromboxanes. Annu Rev Biochem 47: 997-1029 Webb JG, Saelens DA, Halushka PV (1978) Biosynthesis of prostaglandin E by rat superior cervical ganglia. J Neurochem 31:13-19 Yoshimoto T, Yamamoto S, Hayaishi O (1978) Selective inhibition of prostaglandin endoperoxide thromboxane isomerase by 1-carboxyalkyl-imidazoles. Prostaglandins 16: 529-540
منابع مشابه
Effects Of Fast Pathway Ablation On The Concealment Zone And Electrophysiological Behavior Of AV-Node During Atrial Fibrillation.
Objectives: Dual pathways have a determinant role in the occurrence of atrio nodal tachyarrhythmia (AVNRT). The aim of present study is to determine the role of slow pathway (SP) in the concealment zone and protective role of AV node during atrial fibrillation (AF). Material &Methods: In 7 isolated nodal rabbit preparation zone of concealment and concealed conduction is quantified by Specif...
متن کاملSinus node automaticity during atrial fibrillation in isolated rabbit hearts.
BACKGROUND It is still unclear what role the sinus node may play in the genesis or perpetuation of atrial fibrillation. Therefore, we studied the electrical activity in different regions of the sinus node during atrial fibrillation. METHODS AND RESULTS In Langendorff-perfused rabbit hearts, paroxysms of atrial fibrillation were induced by burst pacing. Standard microelectrode techniques were ...
متن کاملAn analysis of the effects of acetylcholine on conduction and refractoriness in the rabbit sinus node.
The effects of acetylcholine (ACh) on sinus node automaticity, atrio-sinus conduction, and refractoriness were studied in 41 isolated rabbit right atrial preparations. Average control rate was 126 beats/min, and ACh 5 x 10(-8) M, 5 x 10(-7) M, and 5 x 10(-6) M significantly decreased heart rate by 7, 15, and 43%, respectively (P less than 0.01, 0.001, and 0.001). Atrio-sinus conduction time at ...
متن کاملSinus node sequences after atrial stimulation: similarities of effects of different methods.
Sinoatrial conduction is commonly assessed from features of the initial cycle after a single atrial extrastimulus or eight beats atrial pacing. In contrast, sinus node automaticity is assessed by the duration of the first interval after prolonged atrial pacing. The return cycle and initial sequences after these different methods were compared in 10 subjects with normal sinus node function and 3...
متن کاملAssessment of sinus node function in patients with the sick sinus syndrome.
SUMMARY Thirty-one patients with symptomatic sinus node dysfunction were evaluated with electrocardiograms, Holter monitor recordings, exercise, isoproterenol infusions, atropine administration, Valsalva maneuvers, carotid sinus massage, and overdrive pacing. Four basic clinical subsets were recognized: (1) carotid sinus hypersensitivity (2) bradyeardia-tachyeardia syndrome, (3) episodic sinus ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Circulation research
دوره 46 6 شماره
صفحات -
تاریخ انتشار 1980