EKG test - NW Hospital Review Exam
Questions & Answers (Grade A+)
what is the range for the PRI? -
correct answer ✅0.12-0.20 seconds
what is the range for the QRS interval? -
correct answer ✅0.06 - <0.12 seconds
what is the range for the QT interval? -
correct answer ✅0.32 - 0.44 seconds (for HR in the 60-100's)
what does depolarization mean? -
correct answer ✅contraction of the heart
what does repolarization mean? -
correct answer ✅relaxation of the heart (filling period)
name the two types of refractory periods -
correct answer ✅1. absolute refractory period
2. relative refractory period
describe the RRP (relative refractory period) and why it can be
lethal -
, EKG test - NW Hospital Review Exam
Questions & Answers (Grade A+)
correct answer ✅RRP - It is possible for a stimulus to cause
another action potential, therefore this is the vulnerable period of
the cardiac cycle.
ex: the longer the QT interval, the more increased risk for the RRP
(zofran, methadone, haldol and amio lengthen the QT interval)
what does the p wave represent? -
correct answer ✅atrial depolarization
how is the atrial heart rate counted? -
correct answer ✅P-P interval
what does the PRI represent? -
correct answer ✅Represents conduction time thru the atria, AV
node and purkinje fibers
what does the QRS interval represent? -
correct answer ✅Represents ventricular depolarization
Questions & Answers (Grade A+)
what is the range for the PRI? -
correct answer ✅0.12-0.20 seconds
what is the range for the QRS interval? -
correct answer ✅0.06 - <0.12 seconds
what is the range for the QT interval? -
correct answer ✅0.32 - 0.44 seconds (for HR in the 60-100's)
what does depolarization mean? -
correct answer ✅contraction of the heart
what does repolarization mean? -
correct answer ✅relaxation of the heart (filling period)
name the two types of refractory periods -
correct answer ✅1. absolute refractory period
2. relative refractory period
describe the RRP (relative refractory period) and why it can be
lethal -
, EKG test - NW Hospital Review Exam
Questions & Answers (Grade A+)
correct answer ✅RRP - It is possible for a stimulus to cause
another action potential, therefore this is the vulnerable period of
the cardiac cycle.
ex: the longer the QT interval, the more increased risk for the RRP
(zofran, methadone, haldol and amio lengthen the QT interval)
what does the p wave represent? -
correct answer ✅atrial depolarization
how is the atrial heart rate counted? -
correct answer ✅P-P interval
what does the PRI represent? -
correct answer ✅Represents conduction time thru the atria, AV
node and purkinje fibers
what does the QRS interval represent? -
correct answer ✅Represents ventricular depolarization
