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What is complete heart block? Cardiology Basics
When natural pacemaker impulses from the sinoatrial node fails to reach the ventricles and activate them, it is known as complete heart block. The block could be at the level of the atrioventricular (AV) node or below that.
Sinus node is a subepicardial structure located in the upper part of right atrium near the orifice of the superior vena cava. Signals from sinus node travel to the AV node through three internodal pathways. They are Wenckebach, Thorel and Bachmann bundles. Bachmann bundle gives a branch to the left atrium also.
AV node is located near the atrioventricular junction in the lower part of right atrium. It ...
Source: Cardiophile MD - October 17, 2022 Category: Cardiology Authors: Johnson Francis Tags: General Cardiology Source Type: blogs
Is first degree heart block dangerous? Cardiology Basics
PR interval is measured from the onset of P wave to the onset of QRS complex. It includes the P wave and the PR segment. Normal PR interval is from 120 to 200 ms. If it is prolonged, it is called as first degree atrioventricular (AV) block.
PR interval is the time taken for activation of the atria and conduction of the impulses down to the ventricles and initiate activation of the ventricles. This includes the physiological delay in conduction at the AV node. The delay allows complete emptying of the atria before the ventricles start contracting. The atrial help to ventricular filling acts like an atrial booster at the en...
Source: Cardiophile MD - October 14, 2022 Category: Cardiology Authors: Johnson Francis Tags: General Cardiology Source Type: blogs
An Adolescent with dizziness and near syncope
Submitted by Maura Corbett, PA-C, written by Alex Bracey, with some comments by Smith and MeyersA teenage male presented to the emergency department with the complaint of dizziness with near-syncope. He was stable and able to provide a history and mentioned that he was asymptomatic while seated but dizzy and weak when attempting to stand. An ECG was recorded:What do you think? There iscomplete (third degree) heart block with wide complex bradycardicescape. The morphology is that of LBBB and so the escape is originating from the right bundle.The possible etiologies of this ECG are:- Structural/congenital heart di...
Source: Dr. Smith's ECG Blog - August 7, 2021 Category: Cardiology Authors: Bracey Source Type: blogs
What do you think of this elderly man with " possible seizure " ?
Written by Pendell Meyers(with really great and thorough explanation of this finding by Ken Grauer).At my hospital, patients with any symptoms which could be vaguely interpreted as a possible stroke during the triage process are brought to the high acuity area and a provider is asked to do a " neuro check " , which involves a quick H and P and exam to determine if we should activate our stroke protocol.A man in his 70s was brought to me for a neuro check, and the triage providers commented that they were worried about a possible seizure as well. The patient was alert and oriented with normal vitals at triage. He stated tha...
Source: Dr. Smith's ECG Blog - May 23, 2020 Category: Cardiology Authors: Pendell Source Type: blogs
Most common cause of acquired heart disease in children in developed countries – Cardiology MCQ
Most common cause of acquired heart disease in children in developed countries:
a) Rheumatic heart disease
b) Viral myocarditis
c) Kawasaki disease
d) Lyme disease
Click here for the correct answer.
Source: Cardiophile MD - May 28, 2018 Category: Cardiology Authors: Prof. Dr. Johnson Francis, MD, DM, FACC, FRCP Edin, FRCP London Tags: Cardiology MCQ DM / DNB Cardiology Entrance Source Type: blogs
Cardiology MCQ Test 4
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This test series requires login for attempting. You can login easily with your Facebook account (Use the CONNECT WITH icon on the upper part of right sidebar displaying t...
Source: Cardiophile MD - October 21, 2017 Category: Cardiology Authors: Johnson Francis Tags: General Cardiology Source Type: blogs
An open letter to Psychological Medicine, again!
In conclusion, noted Wilshire et al., “the claim that patients can recover as a result of CBT and GET is not justified by the data, and is highly misleading to clinicians and patients considering these treatments.”
In short, the PACE trial had null results for recovery, according to the protocol definition selected by the authors themselves. Besides the inflated recovery results reported in Psychological Medicine, the study suffered from a host of other problems, including the following:
*In a paradox, the revised recovery thresholds for physical function and fatigue–two of the four recovery measures–were so lax ...
Source: virology blog - March 23, 2017 Category: Virology Authors: Vincent Racaniello Tags: Commentary Information adaptive pacing therapy CFS chronic fatigue syndrome clinical trial cognitive behavior therapy Dave Tuller exercise graded exercise therapy mecfs myalgic encephalomyelitis outcome PACE trial recovery Source Type: blogs
Cardiomyopathy Quiz
Short quiz on cardiomyopathy
Cardiomyopathy Quiz
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Question 1AV block in the presence of features of dilated cardiomyopathy (DCM), may indica...
Source: Cardiophile MD - December 10, 2016 Category: Cardiology Authors: Prof. Dr. Johnson Francis, MD, DM, FACC, FRCP Edin, FRCP London Tags: Cardiology Cardiology MCQ DM / DNB Cardiology Entrance Source Type: blogs
DM / DNB Cardiology Entrance New Test Series 3
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Source: Cardiophile MD - July 9, 2016 Category: Cardiology Authors: Prof. Dr. Johnson Francis, MD, DM, FACC, FRCP Edin, FRCP London Tags: Cardiology MCQ DM / DNB Cardiology Entrance Featured Source Type: blogs
AV block and DCM – Cardiology MCQ
AV block in the presence of features of dilated cardiomyopathy (DCM), may indicate:
a) Sarcoidosis
b) Lyme disease
c) Myotonic dystrophy
d) All of the above
e) None of the above
Correct answer: d) All of the above
Other conditions associated with this combination are lamin A/C mutation and giant cell myocarditis.
Reference
Japp AG et al.The Diagnosis and Evaluation of Dilated Cardiomyopathy. J Am Coll Cardiol. 2016;67(25):2996-3010.
Source: Cardiophile MD - June 30, 2016 Category: Cardiology Authors: Prof. Dr. Johnson Francis, MD, DM, FACC, FRCP Edin, FRCP London Tags: Cardiology MCQ DM / DNB Cardiology Entrance Source Type: blogs
Research and Reviews in the Fastlane 045
Welcome to the 45th edition of Research and Reviews in the Fastlane. R&R in the Fastlane is a free resource that harnesses the power of social media to allow some of the best and brightest emergency medicine and critical care clinicians from all over the world tell us what they think is worth reading from the published literature.
This edition contains 10 recommended reads. The R&R Editorial Team includes Jeremy Fried, Nudrat Rashid, Soren Rudolph, Anand Swaminathan and, of course, Chris Nickson. Find more R&R in the Fastlane reviews in the R&R Archive, read more about the R&R project or check out the f...
Source: Life in the Fast Lane - August 25, 2014 Category: Emergency Medicine Authors: Anand Swaminathan Tags: Clinical Research Emergency Medicine Intensive Care R&R in the FASTLANE critical care Education literature recommendations Research and Review Source Type: blogs
Transcript of Dr. Bihari Video
00:00 to 02.26—Dr. Bihari gives his background and credentials.
Dr. Bihari: My medical training started at Harvard Medical School. I graduated in 1957. Then I trained in Internal Medicine at one of the Harvard teaching hospitals in Boston, Beth Israel, and then in Neurology at Massachusetts General in Boston. Then I went to the National Institutes of Health for two years doing brain physiology—brain research. I did another residency training in Psychiatry in New York, at Columbia Presbyterian Medical Center and then, over the following five or six years, I got very involved in working in Drug Addiction. By 1974, I was...
Source: HONEST MEDICINE: My Dream for the Future - May 16, 2011 Category: Consumer Health News Authors: JuliaS1573 at aol.com (Julia Schopick) Tags: Anecdotal Treatments HONEST MEDICINE Integrative Medicine Low Dose Naltrexone Obituaries Source Type: blogs
