Heart blocks Flashcards
This heart block is often seen a normal people
First degree block
When you see this heart block, think about acute myocardial infarction and acute rheumatic fever as possible causes
First degree heart block
What is the treatments for first degree heart block
No specific action is needed
But usually indicates heart disease; often seen an acute myocardial infarction
Second degree heart block
What kind of treatment does mOBITZ type two and Wenckebach require?
No specific treatment needed
2:1, 3:1 or 4:1 block may indicate the need for
Temporary pacing, especially if the ventricular rate is slow
Always indicates conducting tissue disease -more often fibrosis and ischemia
Third degree heart block
Consider a temporary or permanent pacemaker for
Third degree heart block
Think about an atrial septal defect
Right bundle branch block
What is the specific treatment for right bundle branch block
No specific treatment is needed
Think about aortic stenosis and ischemic disease
Left bundle branch block
If the patient is asymptomatic, with a left bundle branch block what treatment is needed?
No action is needed
If the patient has recently had severe chest pain, left bundle branch block may indicate what?
An acute myocardial infarction and intervention should be considered.
Think about left ventricular hypertrophy and its causes. What could this be?
Left axis deviation
Indicate severe conducting tissue disease.
Left axis deviation and right bundle branch block
What treatment is indicated for left axis deviation and write bundle branch block?
No specific treatment is needed
If the patient with left axis deviation and right bundle branch block has symptoms suggestive of intermittent or complete heart block what treatment is needed?
pacemaker
Name that block!
If each wave of depolarization that originates in the SA node is conducted to the ventricles, but there is a delay somewhere along the conduction pathway then the PR interval is prolonged period this is called
First degree heart block
First degree heart block is not in itself important but maybe a sign of
Coronary artery disease, acute rheumatic carditis, digoxin toxicity are electrolyte disturbances
Sometimes excitation completely fails to pass through the AV node or the bundle of his. When this occurs intermittently, what is said to exist
Second degree heart block
There are how many variations of second degree heart block
Three
This form of second degree heart block shows a progressive lengthening of the PR interval and then failure of conduction of an eight real beat followed by a conducted beat with a shorter PR interval and then a repetition of this cycle. What is this?
Wenckebach or Mobitz type 1
In this type of second degree heart block most beats are conducted with a constant PR interval that occasionally there is atrial depolarization without a subsequent ventricular depolarization this is called
Mobitz type 2 phenomenon.
There may be alternate conducted and non conducted atrial beats (or one conducted atriall beat and then two or three non conducted beats), giving twice (or three or four times) as many P waves as if you are as complex as. This is called
2:1, 3:1, or 4:1
