Pre-Paramedic Cardio Flashcards
Atria
Thin-walled, low-pressure chambers
Receive blood from systemic circulation and lungs
Atrial kick
Atrial dysrhythmias may occur because of:
Abnormal automaticity
Triggered activity
Reentry
Abnormal automaticity and triggered activity are disorders in impulse formation
Reentry is a disorder in impulse conduction
what is the most common for of an SVT?
Atrioventricular reetrant tachycardia
Also know as AVNRT
Abnormal Automaticity Can occur in
Occurs in normal pacemaker cells and in
Myocardial working cells that do not normally function as pacemaker sites
These cells fire and initiate impulses before a normal SA node impulse
Compensatory Pause
compensatory pause is present if
the period between the complex before and after a premature beat is the same as two normal R-R intervals
Non compensatory Pause
A non compensatory (incomplete) pause often follows a PAC
This represents the delay during which the SA node resets its rhythm for the next beat
Vagal Maneuvers
Methods used to stimulate the vagus nerve and release of acetylcholine. In attempt to slow conduction through the AV node, thereby slowing down the heart rate.
Example: take a 10cc syringe and ask the patient to try and blow the plunger out.
Synchronized cardioversion
is delivery of a shock to the heart by means of a defibrillator to terminate a rapid dysrhythmia.
Examples: narrow QRS tachycardia, AFib, atrial flutter and monomorphic ventricular tachycardia.
(12 lead machine is used for this process)
Triggered Activity
Occurs when escape pacemaker and working cells fire more than once after stimulation by single impulse.
Example: PVC, PAC A-Fib PJC
What Rhythm?
Sinus Rhythm
CHARACTERISTICS OF SINUS RHYTHM
R-R and P-P intervals are regular
60 to 100 BPM
Postive (upright) P-waves one precedes each QRS complex P-waves look alike.
PR interval 0.12 to 0.20 sec constant from beat to beat.
QRS 0.11 sec or less
What Rhythm?
Sinus Bradycardia
CHARACTERISTICS OF SINUS BRADYCARDIA
R-R and P-P intervals are regular
Less than 60 BPM
Postive (upright) P-Wave one precedes each QRS complex
PR-interval 0.12 to 0.20 sec and constant from beat to beat.
QRS 0.11 sec or less (Narrow)
What Rhythm?
Sinus Tachycardia
CHARACTERISTICS SINUS TACHYCARDIA
R-R and P-P intervals are regular
Usually 101-180 BPM
Postive (Upright) P-Waves one procedes each QRS complex; P waves look alike.
PR-interval 0.12 to 0.20 sec and constant from beat to beat.
QRS 0.11 sec or less (Narrow)
What Rhythm?
Sinus Arrhythmia
CHARACTERISTICS SINUS ARRHYTHMIA
Rhythm- Irregular, Typically phasic with breathing
Rate- Usually 60 to 100
P-Waves postive (upright) one with each QRS
PR-interval 0.12 to 0.20 sec
QRS- 0.11 sec or less abnormally conducted
What Rhythm?
Sinoatrial Block
CHARACTERISTICS (SA) BLOCK
Rhythm; Regullar except for the of pause. (Drops one full QRS )
Rate; Varies, because of the pause.
P-waves- when present positive one with each QRS
PR-interval- when prensent 0.12 to 0.20 sec
QRS- 0.11 sec or less, unless abnormally conducted
What Rhythm?
Sinus Arrest
CHARACTERISTICS SINUS ARREST
Rhythm- Regular except for the event of pause. (Drops Two Full QRS)
Rate- varies, because of the pause.
P-Waves- when present, postive (upright) one with each QRS
PR-interval- when present 0.12 to 0.20 sec
QRS- 0.11 sec or less, unless abnormally conducted.
What does VOMIT Stand for?
VITALS
02
MONITOR(12-LEADS)
IV
TRANSPORT
(I AM GOING TO VOMIT THE PATIENT)
What Drug would you push for an Stable SVT patient?
ADENOSINE
If you have an unstable SVT patient that needs Synchronized Cardioversion how many joules would your start with?
50
If you have an unstable patient with A-Fib or Aterial Flutter that needs Synchronized Cardioversion how many joules would your start with?
120
If you have an unstable patient with V-Tach that needs Synchronized Cardioversion how many joules would your start with?
100
What Rhythm?
Premature Atrial complexes
(Also know as PAC’S)
Premature Complexes
Premature beats appear early, that is, they occur before the next expected beat
Premature atrial complexes (PACs)
Premature junctional complexes (PJCs)
Premature ventricular complexes (PVCs)
