BACKGROUND: It is very important to evalute the function of the atrioventricular conduction system in selecting appropriate pacemaker, pacing and sensing mode in sick sinus syndrome. It has been reported that atrioventricular conduction abnormalities were commonly accompanied with sinus node dysfunction (SND). However, there were several long term follow-up studies indicating that incidence of AV conduction abnormalities was as low as below 1% a year in patients with SND implanted pacemaker. This study was performed to evaluate the properties of the AV conduction system in patients with SND. SUBJECT AND METHODS: Patients subjected to this study were fifty-eight who underwent electrophysiologic study on suspicion of SND. Sinus node recovery time (SNRT) was defined as the longest time among the times that sinus rhythm reappeared after rapid atrial pacing for 45 seconds with several cycle lengths, and corrected SNRT (cSNRT) was worked out by subtracting sinus cycle length (SCL) from SNRT. Criteria for sinus node dysfunction were 1550 msec or more on SNRT, 550 msec or more on cSNRT and group A (23 cases, 58+/-13 yrs) was defined as SND not retrieved to normal after intravenous administration of atropine 1-2 mg, group B (21 cases, 52+/-14 yrs) was retrieved to normal and group C (14 cases, 54+/-13 yrs) was normal control group. Abnormalities of the AV conduction system were defined as 150 msec or more on AH interval, 500 msec or more on AVblock cycle length (AV-BCL), 450 msec or more on AV nodeeffective refractory period (AVN-ERP). RESULTS: SCL in group A, B, C was 1197+/-340 msec, 1215+/-273 msec, and 898+/-129 msec, respectively at baseline and 886+/-218 msec, 798+/-106 msec, and 722+/-110 msec respectively after atropine administration, showing a significant prolongation of SCL in group A and B at baseline (p<0.001) and group A after atropine administration (p<0.05). SNRT in group A, B, C was 3520+/-1817 msec, 3180+/-2390 msec, and 1282+/-116, respectively at baseline and 4155+/-4281 msec, 1237+/-210 msec, 1020+/-245 msec, respectively after atropine administration, showing a significant prolongation of SNRT in group A and B at baseline (p<0.001) and group A after atropine administration (p<0.05). AH intervals at baseline and after atropine administration were 107+/-27 msec and 100+/-20 msec in group A, 101+/-21 and 91+/-14 in group B, and 118+/-32 and 83+/-23 in group C, showing no significant difference between 3 groups. AV-BCLs at baseline and after atropine administration were 428+/-151 msec and 453+/-301 msec in group A, 525+/-140 and 370+/-53 in group B, and 461+/-120 361+/-94 in group C, showing no significant difference between 3 groups. AVN-ERP was 315+/-57 msec in group A, 343+/-132 msec in group B, 347+/-132 in group C, showing no significant difference between 3 groups. There was no significant difference in the incidences of cases with abnormal AH interval, AV-BCL, AVN-ERP, HV interval between 3 groups. AV block greater than second degree was observed in one patient of group A but none of group B and C. CONCLUSIONS: Atrioventricular conduction abnormalities in patients with sinus node dysfunction were not more common than control subjects. Therefore, atrial pacing rather than ventricular or dual chamber pacing may be safely selected as a permanent pacing mode for sick sinus syndrome with no combined significant AV block.
Administration, Intravenous ; Atrioventricular Block ; Atropine ; Humans ; Incidence ; Sick Sinus Syndrome* ; Sinoatrial Node*

In propranolol (1. 0mg) pretreated men atropine (0.5mg), ephedrine (20mg) and aramine (2mg) were administered respectively by intravenous route under the ether anesthesia. The results were as follows. 1) Five minutes after intravenous administration of propranolol, the three groups showed decrease of pulse rates, 9, 6 and 8 per minutes respectively, but blood pressure changes were not observed. 2) After intravenous administration of atropine (0.5mg) the decreased pulse rates were increased and blood pressure was elevated. 3) After intravenous administration of ephedrine(20mg) the decreased pulse rates were decreased and lowered blood pressure was lowered further. 4) After intravenous administration of aramine(2.0mg) the lowered blood pressure was elevated, but pulse rate changes were not observed. 5) Circulatory depression due to ether anesthesia after propranolol pretreatment, was corrected by treatment with atropine and aramine, but was not corrected by ephedrine.
Administration, Intravenous ; Anesthesia* ; Atropine ; Blood Pressure* ; Depression ; Ephedrine ; Ether* ; Heart Rate* ; Humans ; Male ; Metaraminol ; Propranolol*

PURPOSE: The pharmacologic effect of atropine on HPS can be considered to control pyloric muscle spasm. Therefore, we studied the effects of intravenous atropine sulfate on the clinical course of HPS, and periodically observed the ultrasonographic appearance of the pyloric muscles after atropine treatment. METHODS:From April 1998 to May 1999, 14 infants who were diagnosed with HPS were treated with intravenous atropine sulfate. Intravenous atropine sulfate was administered at an initial dose of 0.04mg/kg/day, which was divided into 8 equal doses. The daily dose was increased by 0.01 mg/kg/day until vomiting was controlled for an entire day while infants received unrestricted oral feeding. Ultrasonographic examinations were performed during hospitalization and repeated at least every 2 months until normalization of pyloric muscles was confirmed. RESULTS: Intravenous atropine was effective in 12 of 14 infants with HPS and the conditions of 9 of them improved. Two infants who were not free from vomiting despite a week of intravenous atropine sulfate treatment underwent pyloromyotomy. A series of ultrasonographic examinations were done after vomiting had improved with intravenous atropine sulfate. The ultrasonographic findings showed good passage of gastric contents through pyloric canals despite thickening of the pyloric muscles. CONCLUSION: Intravenous administration of atropine sulfate is an effective therapy for HPS and can be an alternative to pyloromyotomy. (J Korean Pediatr Soc 2000;43:763-768)
Administration, Intravenous ; Atropine* ; Hospitalization ; Humans ; Infant ; Muscles ; Pyloric Stenosis, Hypertrophic* ; Spasm ; Vomiting

The purpose of this study was to observe the additive effect of halothane anesthesia and propranolol, and also the effect of atropine and isoproterenol on the heart rate and the blood pressure after propranolol during halothane anesthesia in human-volunteers. The results were as follows: 1) In conscious patients, 10 minutes after intravenous administration of 1.0mg propranolol the heart rate was slower but there was no significant change in the blood pressure. 2) Twenty-thirty minutes after halothane anesthesia, the heart rate was slower by 6 to 8 beats per minute: systolic and diastolic blood pressure was lower by 20.4 torr and 10.5 torr, respectively. 3) 10 minutes after intravenous administration of 1.0mg propranolol during halothane anesthesia, the heart rate was decreased by 7.8, 7.0 per minute: systolic and diastolic blood pressure decreased by 6.7, 5.7 torr and 3.0, 3.9 torr in the atropine and isoproterenol group, respectively. 4) One minute after intravenous administration of atropine 0.5mg after propranolol 1.0mg during halothane anesthesia, the heart rate increased by 12.1 per minute and persisted so far 10 minutes, but the blood pressure did not increase. 5) One minute after intravenous administration of isoproterenol 0.025mg after propranolol 1.0mg during halothane anesthesia, the heart rate had markedly increased by 35, but normalized 10 minutes later. The systolic blood pressure was increased by 13.4 torr but normalized 10 minutes later. 6) The above results indicate: Atropine increases the heart rate which has been slowed with propranolol during halothane anesthesia: isoproterenol increases the heart rate and blood pressure but the duration of action was short. Therefore, authors considered that atropine is useful for the maintenance of heart rate, and continuous administration of isoproterenol for maintenance of blood pressure and heart rate after propranolol during halothane anesthesia.
Administration, Intravenous ; Anesthesia* ; Atropine* ; Blood Pressure* ; Halothane* ; Heart Rate* ; Heart* ; Humans ; Isoproterenol* ; Propranolol*

To combat the cardiovascular depression in blood pressure and palserate induced by halothane anesthesia in healthy persons after administration of propranolol(1.0mg) by the intravenous route, atropnie sulfate(0.5mg), ephedrine Hcl(20mg) and aramine(1.0mg) were administered respectively i.v. The results were as follows: 1) After i.v. administration of atropine sulfate, systolic blood pressure was elevated by 15 mmHg, diastolic blood pressure was elevated by 13mmHg, and pulse rate was increased by 24 per minute. 2) After i.v. administration of ephedrine, systolic blood pressure was elevated by 27 mmHg, diastolic blood pressure was elevated by 17mmHg, but significant pulse rate change was not observed. 3) After i.v. administration of aramine, systolic blood pressure was elevated by 29mmHg, diastolic blood pressure was elevated by 19mmHg, but pulse rate was decreased by 8 per minute. 4) As shown in the above results, in the cardiovascular depression due to halothane anesthesia after propranolol intravenous administration, blood pressure and pulse rated were corrected by treatment with atropine sulfate. Ephedrine and aramine effected elevation of the blood pressure, but not the pulse rate.
Administration, Intravenous ; Anesthesia* ; Atropine ; Blood Pressure* ; Depression ; Ephedrine ; Halothane* ; Heart Rate* ; Humans ; Metaraminol ; Propranolol*

OBJECTIVETo conduct an experimental study on in vitro transdermal absorption of prepared Shangshi Zhitong cataplasm.

METHODFranz diffusing cells and mice were adopted for the percutaneous penetration study. The accumulative percutaneous permeation of total alkaloids, strychnine and atropine in certain time was determined by acid dye colorimetry and HPLC.

RESULTThe accumulative permeation of alkaloids (Q) increased with time (t), with a linear relation between them.

CONCLUSIONThe in vitro percutaneous penetration of Shangshi Zhitong cataplasm complies with the zero-order kinetics.

Administration, Cutaneous ; Alkaloids ; pharmacokinetics ; Animals ; Atropine ; pharmacokinetics ; Drugs, Chinese Herbal ; pharmacokinetics ; Male ; Mice ; Rats ; Rats, Wistar ; Skin Absorption ; Strychnine ; pharmacokinetics

In order to observe the effect on cardiovascular depression due to ether, halothane or penthrane anesthesia with pretreatment of propranolol (1mg) , change in the blood pressure and pulse rate were measured after intravenous administration of atropine(0.5mg), ephedrine(20mg) or aramine(2mg) to healthy volunteers. The results were as follos, 1) In conscious patients, intravenous administration of propranolol(1mg) caused a statistically significant decrease in pulse rate but no significant change in the blood pressure. 2) The atropine group showed that blood pressure increased by 33/23(p<0.01), 15/13(p<0.01) and 3/4(NS) mmHg, and pulse rate also increased by 20(p<0.01), 24(p<0.05), 11(p<0.05) per min. respectively during ether, halothane and penthrane anesthesia. 3) The ephedrine group showed that blood pressure decreased by 5/0(NS) during ether anesthesia, and increased by 27/17(p<0.01) and 30/15(p<0.01) mmHg during halothane and penthrane anesthesia respectively. Pulse rate decreased by 7(p<0.05) per min. during ether anesthesia but showed no significant change during halothane and Penthrane anesthesia. 4) The aramine group showed that blood pressure increased by 70/34(p<0.01), 29/19(p<0.01) and 28/19Ip<0.001) mmHg during ether, halothane and Penthrane anesthesia respectively. Pulse rate increased by 7(NS) per min. during ether anesthesia and decreased by 8(p<0.05) per min. during halothane and Penthrane anesthesia respectively. 5) The above results have shown that atropine caused effective correction of the cardiovascular depression induced by ether, halothane and Penthrane anesthesia with pretreatment of propranolol. Ephedrine showed futher depression and aramine effected elevation of the blood pressure.
Administration, Intravenous ; Anesthesia* ; Atropine ; Blood Pressure ; Depression ; Ephedrine ; Ether* ; Halothane* ; Healthy Volunteers ; Heart Rate* ; Humans ; Metaraminol ; Methoxyflurane* ; Propranolol*

Atropine (2.5 mg/kg), hexamethonium (1 mg/kg), Trasylol (1,000 u/kg), acetazolamide (100 mg/kg), cortisone (5 mg /kg) or procaine (5 mg/kg) were injected intraperitoneally once a day for 21 days into rats (both sexes) fed a low protein diet. The rats were fasted and sacrificed 24 hr after the last injection. Atropine and cortisone, but not the other agents, cause a significant increase in both pancreatic weight and enzymes. Serum amylase increased markedly in the cortisone group and serum GOT and GPT increased but slightly in the atropine group. Enlargement of the pancreatic acini, cellular hypertrophy and increases of zymogen granules were observed in all the groups except the procaine and normal control group. The hypertrophy of acini was more prominent in the atropine and cortisone groups. None of drugs used could induce decrease or depress the enzyme formation and weight of pancreas. This data indicates that long-term administration of these drugs, particularly atropine, cortisone or even other Ragents may induce preferential formation of pancreatic enzymes to exocrine secretions and consequently may cause enlargement of the pancreatic acini.
Acetazolamide/administration & dosage* ; Alanine Transaminase/blood ; Amylases/blood ; Animal ; Aprotinin/administration & dosage* ; Aspartate Aminotransferases/blood ; Atropine/administration & dosage* ; Cortisone/administration & dosage* ; Female ; Hexamethonium Compounds* ; Lipase/blood ; Male ; Organ Weight ; Pancreas/drug effects* ; Pancreas/enzymology ; Procaine/administration & dosage* ; Rats ; Time Factors

Acanthamoeba Keratitis ; diagnosis ; drug therapy ; Anti-Inflammatory Agents, Non-Steroidal ; administration & dosage ; Atropine ; administration & dosage ; Cornea ; pathology ; Diagnosis, Differential ; Diclofenac ; administration & dosage ; Drug Administration Schedule ; Drug Therapy, Combination ; Follow-Up Studies ; Humans ; Mydriatics ; administration & dosage ; Ophthalmic Solutions ; Retrospective Studies

OBJECTIVETo examine the therapeutic effect of combined use of obidoxime and atropine with artificial ventilation on respiratory muscle paralysis caused by omethoate poisoning in rats.

METHODSRats were exposed to 2 times the dose of LD50 omethoate and treated with atropine (10 mg/kg) to counteract cholinergic symptoms. When the rats' respiratory frequency became slower and breathed with difficulty, the trachea intubation and artificial ventilation was carried out. The rats in group A were continuously treated with atropine. The dose of obidoxime for Group B, C and D were 8, 15, 20 mg/kg respectively, given at the same time as artificial ventilation and 1, 2, 3 hours later. The doses of atropine was reduced to 1/3 - 2/3 of the first dose so as to maintain the rats atropinized. If the rat survival was beyond 60 minutes after withdrawal of artificial ventilation, the combined treatment was considered successful. The function of isolated phrenic diaphragm of the rats was observed with MS-302 physiological and pharmacological analysis instrument.

RESULTSNone of the rats in Group A was successful after withdrawal from artificial ventilation and the function of phrenic diaphragm appeared poor; whereas > 80% of the rats in B, C, D Group were successful after withdrawal from artificial ventilation in 3 h and the function of phrenic diaphragm remained well. The survival rate in B, C and D groups were higher after withdrawal from artificial ventilation than that in Group A(P < 0.01). The function of phrenic diaphragm in Group B, C and D were gradually decreased after ACh was added into the container.

CONCLUSIONSCombined use of suitable dose of obidoxime and atropine with artificial ventilation for respiratory muscle paralysis caused by omethoate poisoning could promote the recovery of diaphragm function and reduce the death rate in poisoned rats.

Animals ; Atropine ; administration & dosage ; Dimethoate ; analogs & derivatives ; poisoning ; Drug Therapy, Combination ; Obidoxime Chloride ; administration & dosage ; Rats ; Respiration, Artificial ; Respiratory Paralysis ; drug therapy