) Questions with Correct
Answers {Grade A}100% Verified
Somatic tremors - correct answer Patients tremors or shaking the wires can produce
jittery patterns on the EKG tracing.
Wandering baseline - correct answer sweat or lotion on the patients skin or tension on
the electrode wires can interfere with the signal going to the EKG apparatus causing
the baseline of the tracing to move up and down on the EKG paper.
60-cycle interference - correct answer can produce deflections occurring at rapid rate
that may mimic atrial flutter. this is caused by electrical appliances or apparatus being
used nearby while the tracing is taken.
broken recording - correct answer the stylus goes up and down trying to find the
signal. tis can be caused by loose electrode or cables, or by frayed or broken wires
arrhythmia - correct answer abnormal heart rhythms
,Ischemia - correct answer decreased blood flow to tissue caused by constriction or
occlusion of a blood vessel can cause chest pain or angina
Myocardial infarction - correct answer Death of myocardial cells
PR segment - correct answer .16 mm/s; line from the end of the P wave to the onset of
the QRS complex
ST segment - correct answer From J point to the onset of the T wave; if elevated above
base line could indicate myocardial infarction (STEMI)
Beta Blockers - correct answer Reduce heart rate, blood pressure, myocardial oxygen
consumption, effectively treat angina pectoris and hypertension. Contraindicated for
cardiac stress test.
5-6 liters - correct answer The average adult has __ - ___ _______ of blood.
, 55% - correct answer How much of our blood is plasma?
45% - correct answer How much of our blood is made up of formed elements? RBC,
WBC, Platelets
99% - correct answer ____ Of formed elements are Red Blood cells
Erythrocytes - correct answer Oxygen carrying protein RBC's
120 days - correct answer What is the normal lifespan of an RBC?
4.2-6.2 Million - correct answer How many RBC's are the per microliter of blood?
Thrombocytes - correct answer Platelets are irregularly shaped packets of cytoplasm
formed in the bone marrow from megakaryocytes. Promote blood coagulation.
140,000-440,000 - correct answer What is the average number of platelets per
microliter of blood?