What is a sinus rhythm that is irregular and usually varies with the respiratory rate called?
Sinus Arrhythmia
sawtooth shaped waves occurring at 250 - 300?
what are flutter waves/atrial flutter
the defining characteristic of a first degree heart block?
What is a PR interval greater than 0.20 seconds
a heart block that has PR intervals that get progressively become longer until a QRS complex is dropped.
What is a 2nd degree type 1 (Wenkebach)
Using the R-R method for heart rate calculation, you divide the number of small blocks into...?
1500
What shapes can an atrial P-wave have?
In a junctional rhythm, where is the p wave located?
It can be before, during, or after the QRS complex
In a second degree type 2, the pr intervals are usually
what is regular
What does the p wave represent
what is atrial contraction
Sinus Rhythms originate in this node
What is junctional tachycardia?
Junctional Rhythm with a rate over 100.
a block in which the p waves are regular and the R waves are regular, but there is no correlation between them
what is a 3 rd degree
What is the normal range for a PR interval?
0.12-0.20 seconds
A beat that occurs early and the p wave has a different morphology than the normal beats?
What is a PAC (premature atrial contraction)
Why is the P-wave inverted in a junctional rhythm?
The impulse that depolarized the atrial originates below the atria, causing retrograde conduction.
which heart blocks have varying PR intervals?
what are 3 rd degree and 2 nd degree type 1