#1
Which lead placement is commonly used for monitoring the electrical activity of the heart?
Lead II
ExplanationLead II is commonly used due to its optimal visualization of the P wave, QRS complex, and T wave.
#2
What does the term 'ECG' stand for in cardiac monitoring?
Electrocardiogram
ExplanationECG is a graphical representation of the electrical activity of the heart.
#3
What is the normal range for heart rate in adults at rest?
70-100 beats per minute
ExplanationNormal resting heart rate for adults typically falls between 70 to 100 beats per minute.
#4
Which cardiac chamber pumps oxygenated blood to the rest of the body?
Left ventricle
ExplanationThe left ventricle pumps oxygenated blood to the systemic circulation.
#5
What does the term 'ischemia' refer to in the context of cardiac monitoring?
Inadequate blood flow to the heart muscle
ExplanationIschemia indicates insufficient blood flow to the heart muscle, often due to narrowed arteries.
#6
Which medication is commonly used to treat and prevent abnormal heart rhythms?
Beta-blockers
ExplanationBeta-blockers help regulate heart rhythm by blocking the effects of adrenaline.
#7
Which cardiac rhythm is characterized by chaotic, rapid electrical impulses in the atria?
Atrial Fibrillation
ExplanationAtrial Fibrillation is marked by irregular, fast heartbeats originating in the atria.
#8
What is the purpose of the P-wave in an ECG waveform?
Atrial depolarization
ExplanationThe P-wave represents atrial depolarization or contraction.
#9
What is the primary purpose of the QRS complex in an ECG waveform?
Ventricular depolarization
ExplanationThe QRS complex signifies ventricular depolarization or contraction.
#10
Which term describes a condition where the heart is unable to pump blood effectively?
Heart failure
ExplanationHeart failure occurs when the heart cannot pump enough blood to meet the body's needs.
#11
What is the primary function of the AV (atrioventricular) node in the heart's electrical conduction system?
Delaying the electrical impulses to allow atrial contraction
ExplanationThe AV node delays impulses to ensure coordinated atrial and ventricular contractions.
#12
Which term describes a rapid, regular heart rate that may be felt as palpitations?
Tachycardia
ExplanationTachycardia is an abnormally fast heart rate, often perceived as palpitations.
#13
Which of the following is a common method for non-invasive blood pressure monitoring?
Sphygmomanometer
ExplanationA Sphygmomanometer measures blood pressure using a cuff and gauge.
#14
What is the purpose of a Swan-Ganz catheter in cardiac monitoring?
Cardiac output measurement
ExplanationA Swan-Ganz catheter is used to measure cardiac output and assess heart function.
#15
In the context of cardiac monitoring, what does the acronym PVC stand for?
Premature Ventricular Contraction
ExplanationPVCs are early heartbeats originating in the ventricles, disrupting the normal rhythm.
#16
What is the primary purpose of the QT interval in an ECG waveform?
Ventricular repolarization
ExplanationThe QT interval reflects the time it takes for ventricular repolarization.
#17
What is the primary purpose of a Swan-Ganz catheter in cardiac monitoring?
Cardiac output measurement
ExplanationA Swan-Ganz catheter helps measure cardiac output and assess heart function.