The cardiac conduction system; electrophysiological studies during open heart surgery

1975 ◽  
Vol 135 (3) ◽  
pp. 411-417 ◽  
Author(s):  
A. L. Waldo
Keyword(s):  
Heart Surgery ◽  
Open Heart Surgery ◽  
Conduction System ◽  
Cardiac Conduction ◽  
Cardiac Conduction System ◽  
Open Heart ◽  
Electrophysiological Studies

scholarly journals Pacing the Human Cardiac Conduction System During Open-heart Surgery

Circulation ◽  
1974 ◽  
Vol 50 (3) ◽  
pp. 499-506 ◽  
Author(s):  
JOEL KUPERSMITH ◽  
EHUD KRONGRAD ◽  
FREDERICK O. BOWMAN ◽  
JAMES R. MALM ◽  
ALBERT L. WALDO
Keyword(s):  
Heart Surgery ◽  
Open Heart Surgery ◽  
Conduction System ◽  
Cardiac Conduction ◽  
Cardiac Conduction System ◽  
Open Heart

Complete Heart Block after open Heart Surgery in Children with Congenital Cardiac Diseases Feasibility of more waiting time before PPM administration

2021 ◽  
Vol 4 (11) ◽  
pp. 01-06
Author(s):  
Akbar Molaei
Keyword(s):  
Heart Block ◽  
Congenital Heart ◽  
Heart Surgery ◽  
Complete Heart Block ◽  
Heart Defects ◽  
Open Heart Surgery ◽  
Cardiac Conduction ◽  
Cardiac Diseases ◽  
Open Heart ◽  
Cardiac Disorders

Introduction: Congenital cardiac disorders are the most prevalent congenital disorders which require interventional or surgical treatments. The most common causes of complete heart block (CHB) are degeneration of cardiac conduction system, acute myocardial infarction and congenital cardiac disorders. CHB after congenital heart surgery is of paramount importance which causes post-operation death and heart failure. Application of a pacemaker is a standard treatment for CHB. The purpose of this paper is to study the frequency of early postoperative CHB in patients with congenital cardiac diseases and also the need for temporary (TPM) and permanent (PPM) pacemakers. Materials and methods: This descriptive-analytical and cross-sectional study was conducted on children with congenital heart defects who had undergone open-heart surgery in Tabriz’s Shahid Madani Hospital from 2011 to 2016. Patients with early postoperative CHB were included in the study. Those who had improved on their own and those who needed TPM and PPM were identified and at the end, the frequency of CHB and the need for TPM and PPM were assessed. Results: Of the 2100 operated patients, 109 patients developed early postoperative heart block. The frequency of early CHB after open heart surgery was 5.19%. Of the 109 patients, 69 patients (63.3%) with early postoperative CHB needed TPM, 9 patients needed PPM and 22 patients improved without pacemaker. Conclusion: The prevalence of early CHB in patients operated for congenital cardiac diseases was 5.19%. The need for TPM was high and most of the patients had improved cardiac rhythm with no need for PPM or TPM.

scholarly journals Signal enhancement for detection of specialized atrioventricular conduction system electrograms during open-heart surgery

1977 ◽  
Vol 73 (4) ◽  
pp. 583-588 ◽  
Author(s):  
John Schatz ◽  
Sam Ross ◽  
Ehud Krongrad ◽  
Frederick O. Bowman ◽  
James R. Malm ◽  
...  
Keyword(s):  
Heart Surgery ◽  
Open Heart Surgery ◽  
Signal Enhancement ◽  
Conduction System ◽  
Atrioventricular Conduction ◽  
Open Heart

scholarly journals Effect of xylazine, medetomidine and dexmedetomidine on cardiac conduction in pigs

2018 ◽  
Vol 74 (1) ◽  
pp. 6057-2018
Author(s):  
ALICJA CEPIEL ◽  
AGNIESZKA NOSZCZYK-NOWAK ◽  
ADRIAN JANISZEWSKI ◽  
ROBERT PASŁAWSKI ◽  
URSZULA PASŁAWSKA
Keyword(s):  
Electrophysiological Study ◽  
Companion Animals ◽  
Conduction System ◽  
Cardiac Conduction ◽  
Cardiac Conduction System ◽  
Electrophysiological Activity ◽  
Study Results ◽  
Electrophysiological Studies ◽  
Animal Preparation ◽  
Heart Arrhythmias

The majority of anaesthetics used in studies regarding heart arrhythmias may affect the cardiac conduction system, thus influencing the results. In veterinary medicine, xylazine, medetomidine and dexmedetomidine are commonly used for premedication in laboratory and companion animals. To date, there have been no studies assessing the effect of these substances on the cardiac conduction system. The aim of this study was to assess the effect of xylazine, medetomidine and dexmedetomidine on the parameters of the cardiac conduction system in pigs. The study was carried out on 18 Great White Polish male pigs weighing from 21 to 40 kg. The animals were divided into three equal groups. The animals from the first group received xylazine at a dose of 2 mg/kg i.v.; those from the second group received medetomidine at 40 mcg/kg i.v.; and those from the third group received dexmedetomidine at 10 mcg/kg i.v. The electrophysiological activity of the heart was analysed using an invasive electrophysiological study (EPS). During the EPS, a decrease in the heart rate after substance administration was observed in all animals, but there were no statistically significant differences in the cardiac conduction parameters. A pro-arrhythmic effect of xylazine was observed, but no statistically significant changes in the EPS parameters were noted. Our results indicate that medetomidine and dexmedetomidine may be used as standard premedication drugs in electrophysiological studies in pigs. Their use may facilitate animal preparation procedures without affecting study results..

scholarly journals Neurological Sequelae Following Pediatric Cardiac Interventions

2021 ◽  
Vol 9 (B) ◽  
pp. 137-143
Author(s):  
Hala Agha ◽  
Mai Mahmoud Hussien ◽  
Marian Y Girgis ◽  
Omneya Gamal Eldin Afify ◽  
Mervat Haroun
Keyword(s):  
Heart Surgery ◽  
Open Heart Surgery ◽  
Neurological Complications ◽  
Cross Sectional Study ◽  
Neurological Dysfunction ◽  
Open Heart ◽  
Cross Sectional ◽  
Neurological Sequelae ◽  
Electrophysiological Studies ◽  
Cardiac Catheterizations

AIM: The aim of the present study was to assess neurological sequelae within 30 days of surgical or cardiac catheter interventions in infants and children. METHOD: In this cross-sectional study, we evaluated all patients who developed neurological problems after cardiac interventions either by surgery or by catheter by clinical evaluation, brain imaging, and electrophysiological studies. RESULTS: Among 1200 procedures were performed; 895 (74.6%) were cardiac catheterizations either diagnostic or intervention, 167 (13.9%) were open-heart surgery, and 138 (11.5%) were closed heart surgery. The overall incidence of post-procedure neurological dysfunction in the studied population was 3.4%. The differences between the three groups were statistically significant (p < 0.0001(. In our series, the neurological complications were in the form of disturbed conscious level in 2/41 (4.9%), impaired motor function in 11/41 (26.8%), impaired mental functions in 6/41(14.6%), hyperreflexia in 27/41 (65.9%), and seizures in 38/41 (92.7%). The most common presentation of seizures was in the form of focal fits 21/41 (51.2%), followed by generalized fits in 15/41(36.6%) and then myoclonic fits 2/41 (4.9%). CONCLUSION: Seizures are the most common complication following cardiac interventions in pediatric age and the highest percentage following open heart surgery.

Studies in pacing of the human specialized conduction system during open heart surgery

1973 ◽  
Vol 31 (1) ◽  
pp. 143
Author(s):  
Joel Kupersmith ◽  
Ehud Krongrad ◽  
Alan L. Saroff ◽  
Albert L. Waldo
Keyword(s):  
Heart Surgery ◽  
Open Heart Surgery ◽  
Conduction System ◽  
Open Heart

The Hemostatic Mechanism after Open-Heart Surgery

1978 ◽  
Vol 39 (02) ◽  
pp. 474-487 ◽  
Author(s):  
E R Cole ◽  
F Bachmann ◽  
C A Curry ◽  
D Roby
Keyword(s):  
Extracorporeal Circulation ◽  
Heart Surgery ◽  
Polyacrylamide Gel Electrophoresis ◽  
Open Heart Surgery ◽  
Coagulation System ◽  
Open Heart ◽  
Time Activity ◽  
Post Surgery ◽  
Plasma Fractions ◽  
The Mean

SummaryA prospective study in 13 patients undergoing open-heart surgery with extracorporeal circulation revealed a marked decrease of the mean one-stage prothrombin time activity from 88% to 54% (p <0.005) but lesser decreases of factors I, II, V, VII and X. This apparent discrepancy was due to the appearance of an inhibitor of the extrinsic coagulation system, termed PEC (Protein after Extracorporeal Circulation). The mean plasma PEC level rose from 0.05 U/ml pre-surgery to 0.65 U/ml post-surgery (p <0.0005), and was accompanied by the appearance of additional proteins as evidenced by disc polyacrylamide gel electrophoresis of plasma fractions (p <0.0005). The observed increases of PEC, appearance of abnormal protein bands and concomitant increases of LDH and SGOT suggest that the release of an inhibitor of the coagulation system (similar or identical to PIVKA) may be due to hypoxic liver damage during extracorporeal circulation.

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