Exam (elaborations)
Telemetry Test all Questions & answers solved accurately with Complete Solution Graded A+ latest version
Telemetry Test all Questions & answers solved accurately with Complete Solution Graded A+ latest version
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Telemetry Test Q with complete solutionP waves represent
atrial depolarization
QRS represents
ventricular depolarization
T wave represents
ventricular repolarization
List three functions of the AV node
1) Slows conduction
2) Secondary pacemaker
3) Blocks some impulses when atrial rate is rapid
Explain wide/bizarre QRS morphology
Aberrant conduction resulting in wide complex
List properties of cardiac cells
1) Automaticity
2) Excitability
3) Contractility
4) Conductivity
Asystole: definition, confirmation, interventions
Definition: cessation of electrical and mechanical activity of the heart
Confirmation: check for pulse on patient
Primary Interventions:
1) CPR
, 2) Treat reversible causes
3) Epinephrine
Depolatization
the electrical activation of the cells of the heart that initiates contraction of the
heart muscle, more positive value
Repolarization
Return of the cell to resting state, negative value
Polarized
Resting state of heart muscle
Identify the path electrical impulses travel through the heart starting from the SA
node
1) SA node sends out the electrical impulse
2) Atria contract
3) AV node sends impulse to ventricles
4) Ventricles contract (pump)
5) SA node sends another signal to atria to contract - begins again
Intrinsic rate of sinus
60-100 bpm
Intrinsic rate of junctional
40-60 bpm
Intrinsic rate of Purkinge fiber (ventricular)
20-40 bpm
How does AV dysfunction lead to 1st degree block?
Takes too long for heartbeat to travel from top to bottom of heart
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