scholarly journals Electrocardiographic indices of clinically healthy Chios sheep

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Aliasghar Chalmeh ◽  
Iman Saadat Akhtar ◽  
Mohamad Hadi Zarei ◽  
Mehrdad Badkoubeh
Keyword(s):  
Sinus Rhythm ◽  
Sinus Tachycardia ◽  
Normal Sinus Rhythm ◽  
Sinus Arrhythmia ◽  
Lead System ◽  
Normal Sinus ◽  
Qrs Duration ◽  
Electrocardiographic Findings ◽  
Chios Sheep ◽  
Electrical Activities

Information regarding normal electrocardiographic features of different breeds of animals can help veterinarians to detect any abnormalities in cardiac electrical activities. The current research was conducted to present the normal electrocardiographic indices of clinically healthy Chios ewes and lambs. The electrocardiograms were recorded from clinically healthy Chios ewes (n=27; 2-3 years old) and lambs (n=20; 4-6 months old) by using base apex lead system. T and QRS-duration in lambs were significantly lower than adult Chios ewes. The electrocardiographic amplitudes in lambs were lower than ewes, non-significantly. P-R, R-R, Q-T and S-T intervals in Chios lambs were significantly lower than ewes. No normal sinus rhythm was detected in Chios lambs. The proportion of sinus arrhythmia and sinus tachycardia in lambs was significantly more than ewes. Sino-atrial block was also detected in lambs. Based on the presented data it could be stated that aging can affect electrocardiographic findings of Chios sheep. Finally, our results will provide a good basis for judging the electrocardiograms in base apex lead system of Chios lambs and ewes.

Some effects of breath holding and apneic underwater diving on cardiac rhythm in man

1962 ◽  
Vol 17 (3) ◽  
pp. 461-466 ◽  
Author(s):  
C. Robert Olsen ◽  
Darrell D. Fanestil ◽  
Per F. Scholander
Keyword(s):  
Cardiac Arrhythmias ◽  
Cardiac Rhythm ◽  
Sinus Tachycardia ◽  
Normal Sinus Rhythm ◽  
Sinus Bradycardia ◽  
Breath Holding ◽  
Sinus Arrest ◽  
Sinus Arrhythmia ◽  
Normal Sinus ◽  
Idioventricular Rhythm

Man's bradycardic response to simple breath holding was augmented by submersion in water of 27 C and was not prevented by muscular exercise. Cardiac arrhythmias occurred with 45 of 64 periods of apnea in 16 subjects and were more frequent during the dives than during breath holding. These arrhythmias, with the exception of atrial, nodal, and ventricular premature contractions, were inhibitory in type and included sinus bradycardia and arrhythmia, sinus arrest followed by either nodal escape or ventricular escape, A-V block, A-V nodal rhythm, and idioventricular rhythm. T waves frequently became tall and peaked during both breath holding and dives. Prompt return to normal sinus rhythm was the rule with the first breath after surfacing. Sinus tachycardia, sinus arrhythmia, and atrial, nodal, or ventricular premature contractions were seen during recovery. Submitted on October 9, 1961

Effects of sympathomimetic amines studied by direct perfusion of the sinus node

1963 ◽  
Vol 204 (4) ◽  
pp. 591-594 ◽  
Author(s):  
Thomas N. James ◽  
Reginald A. Nadeau
Keyword(s):  
Sinus Rhythm ◽  
Sinus Tachycardia ◽  
Decay Curve ◽  
Normal Sinus Rhythm ◽  
Sinus Node ◽  
Duration Of Action ◽  
Sympathomimetic Amines ◽  
Normal Sinus

The effect of epinephrine, norepinephrine, isoproterenol, and ephedrine on normal sinus rhythm has been studied by direct perfusion of the sinus node through its own artery, and compared to the results of stellate stimulation. The maximal sinus tachycardia produced by each of these substances was about the same, and resembled the response to stellate stimulation. To produce maximal tachycardia the doses of epinephrine and norepinephrine were about equal, but were about ten times the dose of isoproterenol required, and one-tenth the dose of ephedrine required. Duration of action of each of the catecholamines was similar, but that of ephedrine was about ten times longer. Dichloroisoproterenol perfused into the sinus node effectively blocked the response to moderate doses of all the test substances but incompletely blocked that to larger doses or the effect of direct stellate stimulation. Subsidence of the effect of the intranodal catecholamines followed a characteristic decay curve.

scholarly journals 829 Perioperative Surgical Patients and The Availability and Utilisation Of ECGs Machines Pre- And Post-Pandemic

2021 ◽  
Vol 108 (Supplement_6) ◽  
Author(s):  
J Wareing ◽  
H Sandhar ◽  
A Howitt ◽  
M Yiasemidou ◽  
D Craske
Keyword(s):  
Atrial Fibrillation ◽  
Sinus Rhythm ◽  
Supraventricular Tachycardia ◽  
Patient Outcomes ◽  
Sinus Tachycardia ◽  
Normal Sinus Rhythm ◽  
Cardiac Pathology ◽  
Normal Sinus ◽  
The Impact ◽  
Operative Monitoring

Abstract Introduction ECGs are a NICE recommended pre-operative investigation and an integral part of post-operative monitoring. Delay in recognition of cardiac pathology can be catastrophic. Therefore, ECG machines should be readily available. Here, we report the results of an audit assessing the availability of ECG machines in surgical wards. Method In 2018 and then 2020, a bespoke, nine-item audit proforma was disseminated to all foundation doctors. Results In 2018, 17/32 wards had a ward based, readily available machine, 6/32 shared with another ward and 15/32 did not have a ward-based machine. The same was noted in 2020. In 2018 and 2020, the average time to obtain an ECG machine was 27 and 23 respectively. When no ECG was available, a doctor would obtain the machine 24% in 2018 compare to 52% in 2020. The diagnoses of the patients who had ECGs in 2018 were: normal sinus rhythm, atrial fibrillation, bradycardia, supraventricular tachycardia, sinus tachycardia and STEMI. In 2020 were: normal sinus rhythm, atrial fibrillation, supraventricular tachycardia, sinus tachycardia, atrial flutter, bradycardia, prolonged QTc, hyperkalaemia, STEMI and NSTEMI. The average time for NSTEMI patients to have an ECG was 35mins while for STEMI patients was 11.6mins. Conclusions Whilst our audit has highlighted the importance of ECG machine availability, the time to obtain one remained static between the two cycles. A study investigating the impact on patient outcomes may highlight the necessity for available ECG machines further.

Ventricular Tachycardia and Ventricular Fibrillation Analysis Based on Jensen-Shannon Divergence Analysis

2013 ◽  
Vol 321-324 ◽  
pp. 712-715
Author(s):  
Zheng Zhong Zheng ◽  
Jun Chang Zhao ◽  
Jun Wang
Keyword(s):  
Ventricular Tachycardia ◽  
Ventricular Fibrillation ◽  
Sinus Rhythm ◽  
Complexity Analysis ◽  
Heart Function ◽  
Normal Sinus Rhythm ◽  
Normal Sinus ◽  
Practice Of Medicine ◽  
Cardiac Sudden Death ◽  
Jensen Shannon Divergence

t is an important method for using electrocardiogram (ECG) to detect and diagnose heart function in clinical practice of medicine. Ventricular tachycardia (VT) and ventricular fibrillation (VF) are serious threats for peoples lives, they often bring about cardiac sudden death. In this paper, the complexity analysis method based on Jensen-Shannon Divergence was used to calculate the complexity of the normal sinus rhythm signals, VT, VF. The study found that the VF was highest, followed by that of VT, and that of normal sinus rhythm signals was minimum. The result can be used to assisted clinical diagnosis.

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