blood flow
The human heart has __________ chambers.
4
0.12-0.20 seconds
appears as a flat line on the rhythm strip
asystole
PR interval reads 0.28 seconds
first degree block
HR: 180
BP: 125/86
No chest pain, SOB, AMS
pt was sitting when the palpitations started
hint: it is not adenosine
Vagal Maneuvers
What separates the left and right sides of the heart?
Septum
What is a normal QRS measurement?
0.08-0.12 seconds
Rate of less than 60 beats/min
Upright P wave preceding every QRS complex
Can cause:
Altered mental status,Ischemic chest discomfort,Acute heart failure,Seizures/syncope,Hypotension
Treatment indicated when signs/symptoms persist despite adequate airway and breathing
sinus bradycardia
conduction through the AV node progressively slows until one atrial impulse fails to reach the ventricles
can be caused from Digoxin toxicity
Second degree type 1 block
monomorphic rhythm on the monitor
rate 180
bp; 136/87
chest discomfort
no prior history
Amiodarone drip
Receives blood low in oxygen from the superior vena cava, inferior vena cava, and the coronary sinus
right atrium
Three standard limb leads?
I, II , III
§Originates from a site above the ventricles
§Faster than 100 beats/min at rest
§QRS complexes measure 0.11 second or less
§At a rate of 150 to 180 beats/min, P waves are obscured by the T wave of the preceding beat
SVT
omplete failure of electrical conduction between the atria and ventricles, resulting in independent atrial and ventricular rhythms and potentially life-threatening bradycardia
3rd degree heart block
HR:30
Shortness of breath
BP:86/64
p waves and QRS don't match
no evidence of ST elevation
What is the valve separating the left atrium from the left ventricle called?
Mitral valve
One 1-mm box = ?
0.04 second
Polymorphic tachycardia
usually due to a Insufficient amount of magnesium
Torsades
serious conduction disorder where some atrial impulses fail to reach the ventricles, often leading to dropped QRS complexes and a high risk of complete heart block.
second degree type 2
HR: 86
spo2: 80
BGL: 65
Temperature: 97
Present p waves, qrs is normal, t wave present
skin is cool/ pale/ diaphoretic
no pulse is felt
CPR
§Right atrium
§Right ventricle
§Part of the left ventricle
§Portions of the conduction system
These are supplied by what artery ?
RCA (right coronary artery)
what does the T wave represent on a ECG ?
ventricular repolarization
rate of 20-40
Wide complex QRS
Failure with SA and AV node
idioventricular
what is the other two names for a second-degree type 2 block?
mobitz II or hay block
rate is sustained between 150-170 bpm
irregular irregular rhythm is noted
Short of breath and chest discomfort
BP: 165/78
history of sick sinus syndrome
synchronized cardioversion