#1
What does EKG stand for?
Electrocardiogram
ExplanationAbbreviation for a test measuring electrical activity of the heart.
#2
What is the term for the interval between two successive QRS complexes?
RR interval
ExplanationTime between two consecutive ventricular depolarizations.
#3
What is the term for an abnormally slow heart rate?
Bradycardia
ExplanationCondition characterized by a low heart rate.
#4
Which EKG lead is commonly used to assess the lateral wall of the left ventricle?
Lead aVL
ExplanationView focusing on the left side of the heart.
#5
What is the term for an absence of electrical activity in the heart?
Asystole
ExplanationComplete absence of heart contractions.
#6
Which component of the heart's conduction system is responsible for initiating the heartbeat?
SA node
ExplanationThe natural pacemaker of the heart, initiating the heartbeat.
#7
What does the P wave represent in an EKG?
Atrial depolarization
ExplanationDepolarization of the atria, leading to atrial contraction.
#8
What is the normal duration of the QRS complex in milliseconds?
Less than 0.12 seconds
ExplanationIndicates normal conduction through the ventricles.
#9
Which electrolyte imbalance can cause a prolonged QT interval on an EKG?
Hypokalemia
ExplanationLow potassium levels affecting heart's electrical conduction.
#10
What is the most common cause of peaked T waves on an EKG?
Hyperkalemia
ExplanationElevated potassium levels, affecting ventricular repolarization.
#11
Which lead placement is commonly used for monitoring in a standard 12-lead EKG?
V1 - V6
ExplanationPlacement for observing various aspects of heart activity.
#12
In a normal sinus rhythm, what is the approximate rate of atrial depolarization in beats per minute (bpm)?
60-100 bpm
ExplanationHealthy range for atrial electrical activity.
#13
What is the primary purpose of the ST segment analysis in an EKG?
To detect myocardial ischemia or injury
ExplanationIndicates possible blockages or damage to heart muscle.
#14
Which EKG lead is commonly used to assess the inferior wall of the heart?
Lead II
ExplanationView oriented to detect issues in the lower part of the heart.
#15
What is the most common cause of a shortened QT interval on an EKG?
Hypokalemia
ExplanationLow potassium levels influencing ventricular repolarization.