The effect of acidosis on the ECG of the rat heart

被引:24
作者
Aberra, A
Komukai, K
Howarth, FC
Orchard, CH
机构
[1] United Arab Emirates Univ, Fac Med & Hlth Sci, Al Ain, U Arab Emirates
[2] Univ Leeds, Sch Biomed Sci, Leeds LS2 9NL, W Yorkshire, England
[3] Univ Addis Ababa, Fac Med, Addis Ababa, Ethiopia
关键词
D O I
10.1113/eph8602051
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
We have investigated the effect of acidosis on the ECG in isolated rat heart to determine whether acidosis has marked effects on the ECG, and have used pharmacological agents to investigate possible mechanisms whereby acidosis alters the ECG. Acidosis produced a marked decrease in heart rate and an increase in P-R interval with little apparent effect on the duration of the QRS complex. The effects of acidosis did not appear to be due to acidosis-induced changes in transmitter release from severed autonomic nerve terminals within the heart.
引用
收藏
页码:27 / 31
页数:5
相关论文
共 17 条
[1]   HETEROGENEITY WITHIN THE VENTRICULAR WALL - ELECTROPHYSIOLOGY AND PHARMACOLOGY OF EPICARDIAL, ENDOCARDIAL, AND M-CELLS [J].
ANTZELEVITCH, C ;
SICOURI, S ;
LITOVSKY, SH ;
LUKAS, A ;
KRISHNAN, SC ;
DIDIEGO, JM ;
GINTANT, GA ;
LIU, DW .
CIRCULATION RESEARCH, 1991, 69 (06) :1427-1449
[2]  
ANTZELEVITCH C, 1994, CARDIAC ARRHYTHMIA M, P88
[3]   Differences in regional distribution of K+ current densities in rat ventricle [J].
Casis, O ;
Iriarte, M ;
Gallego, M ;
Sánchez-Chapula, JA .
LIFE SCIENCES, 1998, 63 (05) :391-400
[4]   Heterogeneous distribution of the two components of delayed rectifier K+ current:: a potential mechanism of the proarrhythmic effects of methanesulfonanilide class III agents [J].
Cheng, JH ;
Kamiya, K ;
Liu, WR ;
Tsuji, Y ;
Toyama, J ;
Kodama, I .
CARDIOVASCULAR RESEARCH, 1999, 43 (01) :135-147
[5]   EFFECTS OF ACID-BASE CHANGES ON EXCITATION-CONTRACTION COUPLING IN GUINEA-PIG AND RABBIT CARDIAC VENTRICULAR MUSCLE [J].
FRY, CH ;
POOLEWILSON, PA .
JOURNAL OF PHYSIOLOGY-LONDON, 1981, 313 (APR) :141-160
[6]   CHRONOTROPIC RESPONSE OF ISOLATED ATRIA TO ACID-BASE ALTERATIONS [J].
GENDE, OA ;
CAMILIONDEHURTADO, MC ;
CINGOLANI, EH .
ARCHIVES INTERNATIONALES DE PHYSIOLOGIE DE BIOCHIMIE ET DE BIOPHYSIQUE, 1978, 86 (05) :997-1009
[7]   Effect of acidosis on Ca2+ uptake and release by sarcoplasmic reticulum of intact rat ventricular myocytes [J].
Hulme, JT ;
Orchard, CH .
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY, 1998, 275 (03) :H977-H987
[8]   Effect of acidosis on transient outward potassium current in isolated rat ventricular myocytes [J].
Hulme, JT ;
Orchard, CH .
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY, 2000, 278 (01) :H50-H59
[9]   INTRACELLULAR AND EXTRACELLULAR ACTIONS OF PROTON ON THE CALCIUM CURRENT OF ISOLATED GUINEA-PIG VENTRICULAR CELLS [J].
IRISAWA, H ;
SATO, R .
CIRCULATION RESEARCH, 1986, 59 (03) :348-355
[10]   INTERACTION OF ACIDOSIS AND INCREASED EXTRACELLULAR POTASSIUM ON ACTION-POTENTIAL CHARACTERISTICS AND CONDUCTION IN GUINEA-PIG VENTRICULAR MUSCLE [J].
KAGIYAMA, Y ;
HILL, JL ;
GETTES, LS .
CIRCULATION RESEARCH, 1982, 51 (05) :614-623