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OCEMT Cardiac questions with correct answers.
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OCEMT Cardiac questions with correct answers.
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OCEMT Cardiac questions with correct answers1. How do Arterioles regulate Blood Pressure Correct Answer--
Arterioles have muscular walls and are the primary site of vascular
resistance.
- The greatest change in blood pressure and velocity of blood flow
occurs at the transition of arterioles to capillaries
alpha 1 receptors Correct Answer-• Mydriasis: dilation of the pupil.
• Increased perfusion pressure during compressions for CPR.
• Vascular vasoconstriction
alpha 2 receptors Correct Answer-• The suppression of norepinephrine
release.
• The suppression of acetylcholine release.
• The inhibition of insulin release.
Beta 1 Receptors Correct Answer-• Tachycardia: a fast heart rate
(chronotropy)
• Increased automaticity of the heart (dromotropy)
• Increased Contractile force (Inotrophy)
Beta 2 receptors Correct Answer-• Relaxes smooth muscles of the
bronchial tree.
• *beta 2 agonists are primarily used to treat asthma and other
pulmonary disorders
,Beta 3 receptors Correct Answer-* Their role in gallbladder physiology
is unknown, but they are thought to play a role in lipolysis and
thermogenesis in brown fat.
* In the urinary bladder it is thought to cause relaxation of the bladder
and prevention of urination.
found in the gallbladder, urinary bladder, and in brown adipose tissue.
3. Intrinsic rate of atrial, junctional, ventricular pacemaker cells Correct
Answer-a. Atrial= 60-100 Brady= <60, Tachy= >100
b. Junctional= 40-60, Accelerated= 60-100, Tachy= >100
c. Ventricular=20-40, Accelerated= 40-100, Tachy= >100
P wave definition Correct Answer-atrial depolarization
P wave size Correct Answer-- less than 0.11 seconds and the amplitude
is less than 2.5 mm tall.
Inverted or absent P waves indicate Correct Answer-that the rhythm
does not originate in the SA node or in the atria
QRS complex is defined as Correct Answer-ventricular depolarization
QRS measurement Correct Answer-- duration of 0.12 seconds or less
, Q wave length and height Correct Answer-- >.04 sec Pathologic
- <.04 Physiologic
- deeper than 1/3 the height of the R may indicate AMI.
The T WAVE is defined as Correct Answer-- VENTRICULAR
REPOLARIZATION.
Peaked T Waves may indicate Correct Answer-HYPERKALEMIA
(excessive potassium in blood).
Deeply Inverted T waves Correct Answer-may be seen in acute CNS
events (Intracranial hemorrhage or stroke).
U Wave Location and indications Correct Answer-- May be Present
following the T, representing the final stage of ventricular repolarization.
- Extra tall U Wave may indicate Hypocalcemia
Beta blockers MoA Correct Answer-work by blocking epinephrine at the
beta receptor sites
common signs and symptoms of beta blocker OD are Correct Answer--
bradycardia
-dyspnea
-generalized weakness
-dizziness.
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