scholarly journals Expert’s Opinion–Challenging ECG

2020 ◽  
Vol 5 (04) ◽  
pp. 368-372
Author(s):  
Seema Kale
Keyword(s):  
Myocardial Ischaemia ◽  
Heart Block ◽  
Complete Heart Block ◽  
Conduction System ◽  
Av Block ◽  
Av Node ◽  
Purkinje System ◽  
Expert’S Opinion

AbstractVarying kinds of AV blocks can occur in the setting of myocardial ischaemia or due to degeneration of conduction system. Wenckebach AV block can present with typical Wenckebach periodicity or atypical periodicity. A variant of atypical Wenckebach periodicity may present like Mobitz II AV block. This is called Pseudo Mobitz II AV block. As we are aware that Mobitz II AV block is more dangerous and can suddenly convert into complete heart block, it is essential that we should try to differentiate between Mobitz and Pseudo Mobitz II blocks. Infact atypical Wenckebach cycles are quite common at both AV node and his Purkinje system.

Mobitz Type II Atrioventricular Block in a Newborn

PEDIATRICS ◽  
1972 ◽  
Vol 50 (2) ◽  
pp. 333-336
Author(s):  
David T. Kelly ◽  
Richard D. Rowe
Keyword(s):  
Heart Block ◽  
Complete Heart Block ◽  
Type Ii ◽  
Av Block ◽  
Ventricular Pacing ◽  
Qrs Complex ◽  
Av Node ◽  
Cardiac Lesion ◽  
Congenital Complete Heart Block ◽  
Mobitz Type

Patients with congenital complete heart block and no other cardiac lesion usually are asvmptomatic and have a normal axis and QRS pattern on the electrocardiogram. The site of the block is usually in the region of the AV node. Another less common type of congenital AV block has an abnormal QRS complex on the electrocardiogram. Death from Stokes-Adams attack has been recorded in infancy in this group. Mobitz Type II block is very rare in infancy but may precede complete heart block which requires ventricular pacing. The purpose of this report is to illustrate Mobitz Type II heart block in a newborn which progressed to complete block.

Complete Heart Block in Epstein-Barr Myocarditis

PEDIATRICS ◽  
1978 ◽  
Vol 62 (5) ◽  
pp. 847-849
Author(s):  
Milton J. Reitman ◽  
Heddu J. Zirin ◽  
Charles J. DeAngelis
Keyword(s):  
Infectious Mononucleosis ◽  
Heart Block ◽  
Epstein Barr Virus ◽  
Complete Heart Block ◽  
Conduction System ◽  
Pacemaker Therapy ◽  
Barr Virus ◽  
Cardiac Evaluation ◽  
Life Threatening ◽  
Epstein Barr

The clinician must recognize that the Epstein-Barr virus can affect the conduction system of the heart. Therefore, children with infectious mononucleosis who develop bradycardia or hypotension deserve careful cardiac evaluation, including serial ECGs. Pacemaker therapy may be necessary in the treatment of life-threatening bradyarrhymias.

CONGENITAL HEART BLOCK DUE TO A LESION IN THE CONDUCTION SYSTEM

PEDIATRICS ◽  
1970 ◽  
Vol 45 (4) ◽  
pp. 640-650
Author(s):  
Cirilo Sotelo-Avila ◽  
Harvey S. Rosenberg ◽  
Dan G. McNamara
Keyword(s):  
Heart Block ◽  
Congenital Heart ◽  
Complete Heart Block ◽  
Fibrous Tissue ◽  
Postmortem Examination ◽  
Conduction System ◽  
Cardiac Conduction ◽  
Fibrous Body ◽  
Congenital Complete Heart Block ◽  
Bundle Of His

The cardiac conduction system of an infant with congenital complete heart block was studied at postmortem examination by subserial sections of the interatrial and interventricular septa. A localized area of necrosis in the central fibrous body interrupted the penetrating portion of the bundle of His. The cardiac structure was intact, with no abnormality other than the lesions in the fibrous tissue. The lesion is interpreted as the result of an acquired inflammation late in intrauterine life, with damage localized to the cardiac central fibrous body.

A technique for production of complete atrioventricular block in dogs

1991 ◽  
Vol 261 (4) ◽  
pp. H1312-H1316 ◽  
Author(s):  
T. K. Day ◽  
W. W. Muir
Keyword(s):  
Ventricular Arrhythmias ◽  
Complete Heart Block ◽  
Formaldehyde Solution ◽  
Av Block ◽  
Complete Atrioventricular Block ◽  
Special Equipment ◽  
Av Node ◽  
Reliable Technique ◽  
Complete Atrioventricular ◽  
Complete Av Block

A simple and reliable technique for producing complete atrioventricular (AV) block in dogs by the injection of a 38% formaldehyde solution into the area of the AV node is described. This technique, a modification of previous methods utilizing formaldehyde injection for the production of complete AV block, uses the coronary sinus as the major landmark. Complete heart block was produced in 20 of 20 dogs. The technique is simple and associated with few problems, does not require special equipment, is associated with little or no hemorrhage from the injection site, and does not enter a cardiac chamber. The only side effect noted was the development of ventricular arrhythmias in 2 of 20 dogs. A detailed description of the technique is included with comparisons to previous techniques utilizing injection of a 40% formaldehyde solution.

scholarly journals Mobitz II AV block within the His bundle, with progression to complete heart block.

Heart ◽  
1976 ◽  
Vol 38 (8) ◽  
pp. 868-872 ◽  
Author(s):  
L M Amuchastegui ◽  
E Moreyra ◽  
L E Alday
Keyword(s):  
Heart Block ◽  
Complete Heart Block ◽  
Av Block ◽  
His Bundle

scholarly journals Complete Heart Block In Pregnancy : A Case Report

2021 ◽  
Author(s):  
Dhanang Ali Yafi ◽  
Cloudia Noviani ◽  
Rahmi Eka Saputri ◽  
Adi Purnawarman ◽  
Mohd. Andalas ◽  
...  
Keyword(s):  
Heart Block ◽  
Multidisciplinary Approach ◽  
Complete Heart Block ◽  
Rare Condition ◽  
Cardiac Conduction ◽  
Close Monitoring ◽  
Av Block ◽  
Cardiac Functions ◽  
Temporary Pacemaker ◽  
In Pregnancy

Background: Complete heart block occurs due to various pathological conditions that cause an infiltration, fibrosis, or lose the connection from a part of the cardiac conduction system. Complete heart  block in pregnancy is often caused by congenital anomalies. Around 30% cases, complete heart block remain asymptomatic and not detected until adulthood and may present in pregnancy state and puerperium. When the reversible cause of the AV Block cannot be found, the permanent pacemaker or temporary pacemaker may be indicated when the patients show the symptoms. Case Illusration: A-21 year old female, G2P0A1 preterm pregnancy (27-28 weeks) with bradycardia. From electrocardiograph examination revealed Total AV Block with junctional escape rhytym. Transthoracic echocardiogram shows massive tricuspid regurgitation, early phase of peripartum cardiomyopathy and ejection fraction 36-40%. Caesarean section was peformed due to PPROM. A male baby was born with birth weight of 1100 grams, 32 centimeters of body length and APGAR score of 7/9. The baby was died in NICU on day care 4th, with suspected respiratory problem. Conclusion: Complete heart block in pregnancy is a rare condition. This condition could remain asymptomatic and not detected until pregnancy. Multidisciplinary approach, close monitoring of the symptoms and cardiac functions are needed for patients with CHB.

Specific Arrhythmias and Syncope

2012 ◽  
Author(s):  
Peter A. Brady
Keyword(s):  
Heart Rate ◽  
Heart Block ◽  
Heart Rate Response ◽  
Spontaneous Recovery ◽  
Sinus Node ◽  
Conduction System ◽  
Purkinje System ◽  
Transient Loss ◽  
System Disorder ◽  
Response To Exercise

Bradycardia is defined as a heart rate less than 60 beats per minute at rest or a decreased heart rate response to exercise. Causes of bradycardia include high vagal tone (most cases occur in asymptomatic and often fit and healthy persons), sinus node dysfunction, drug therapy, heart block, and myocardial infarction. A conduction system disorder is present when there is a delay in impulses from the sinus node reaching the ventricles or when some impulses do not reach the ventricles because of block within the AV node or distal conduction system (His-Purkinje system). Conduction system disorders can be divided into first-degree, second-degree, and third-degree (complete) heart block. The tachycardias (atrial fibrillation and atrial flutter) and syncope (as a transient loss of consciousness with spontaneous recovery) are also reviewed.

scholarly journals Ticagrelor-Induced Paroxysmal Complete Heart Block

2020 ◽  
Vol 1 (2) ◽  
pp. 67-69
Author(s):  
Rajendra Kumar Premchand ◽  
Hygriv Rao ◽  
Yerra Shiva Kumar ◽  
Surya Kant Jena ◽  
P. Sarika
Keyword(s):  
Heart Block ◽  
Complete Heart Block ◽  
Medical Condition ◽  
Permanent Pacemaker ◽  
Conduction System ◽  
Uncommon Condition ◽  
Underlying Medical Condition

Complete heart block is an uncommon condition that can be fatal if unidentified, as it affects the conduction system of the heart. The phenomenon may be caused by a drug or underlying medical condition requiring a temporary or permanent pacemaker to stabilize the condition. We report a case of complete heart block precipitated by ticagrelor which was reversed with the cessation of ticagrelor therapy.

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