pretest Flashcards
. Common causes of cardiogenic shock
include
acute MI, pulmonary embolism, COPD exacerbation, and pneumonia
occurs after an acute spinal cord injury, which disrupts
sympathetic innervation resulting in hypotension and bradycardia. Anaphylactic
shock
neurogenic shock
supraventricular tachycardia
narrow complex regular tachycardia
caused by a reentry or an ectopic pacemaker in areas of the heart above the bundle of His, usually the atria
First-line treatment for a patient with stable SVT is ?
vagal maneuvers- bear down, include carotid sinus massage (after auscultating for carotid bruits) and facial immersion in cold water.
If vagal maneuvers fail, the next step is adenosine
originates from ectopic
ventricular pacemakers and is usually a regular rhythm with rate greater
than 100 beats per minute and wide QRS complexes.
Ventricular tachycardia (VT)
Ventricular tachycardia treatment unstable
In unstable pts, synchronized cardioversion
Ventricular tachycardia treatment stable
1st line- Amiodarone 150-mg IV over 10 minutes
Drugs that can be given thru endotracheal tube
naloxone, atropine, versed, epinephrine, and lidocaine
mnemonic NAVEL.
Unstable A-Fib treatment
cardioversion
Cardioversion vs defibrillation
Cardioversion is performed with organized cardiac electrical activity with pulses
defibrillation is performed on patients without pulses
The key step when cardioverting is to activate the synchronization mode and confirm the presence of ?
sync markers on the R waves
prior to delivering electrical energy.
machine ids R waves and wont deliver electrical energy during it
pulseless electrical activity (PEA)
cardiac electrical activity but no detectable pulses
patients with ESR have ↑ risk of hyperkalemia –> PEA
_____ should be given first to stabilize the cardiac membranes
calcium gluconate
Biphasic defibrillation
delivers a charge in one direction for
1/2 of shock, then opposite direction for the second 1/2.
significantly↓ energy for defibrillation and ↓ the risk of myocardial damage.
________ is never recommended for asystole.
Defibrillation