#1
Which of the following is NOT a cardiac conduction disorder?
Hypertension
ExplanationHypertension is a vascular condition, not a cardiac conduction disorder.
#2
Which of the following is a potential complication of untreated heart block?
Heart Failure
ExplanationUntreated heart block can lead to inadequate pumping and eventual heart failure.
#3
Which of the following is a common symptom of atrial fibrillation?
Palpitations
ExplanationAtrial fibrillation often presents with palpitations due to irregular heartbeats.
#4
Which condition is characterized by a slow heart rate due to dysfunction of the sinoatrial (SA) node?
Sick Sinus Syndrome
ExplanationSick Sinus Syndrome involves a slow heart rate due to SA node dysfunction.
#5
Which of the following is a common manifestation of complete heart block?
Syncope
ExplanationComplete heart block can lead to syncope due to inadequate blood flow.
#6
Which of the following is NOT a common symptom of heart block?
Chest Pain
ExplanationChest pain is not a typical symptom of heart block.
#7
What part of the heart is primarily responsible for initiating the heart's electrical impulse?
Sinoatrial (SA) Node
ExplanationThe SA node is the natural pacemaker of the heart, initiating the electrical signal.
#8
Which ECG characteristic is typically associated with first-degree heart block?
Prolonged PR interval
ExplanationFirst-degree heart block is identified by a prolonged PR interval on ECG.
#9
Which of the following medications is commonly used to treat supraventricular tachycardia (SVT)?
Adenosine
ExplanationAdenosine is often used to terminate SVT episodes.
#10
Which cardiac conduction disorder is characterized by an abnormal delay or blockage of electrical impulses at the atrioventricular (AV) node?
Heart Block
ExplanationHeart Block involves delayed or blocked impulses at the AV node.
#11
Which of the following is a potential cause of second-degree heart block type II?
Ischemic heart disease
ExplanationSecond-degree heart block type II can be caused by ischemic heart disease.
#12
What is the characteristic ECG pattern seen in Wolff-Parkinson-White (WPW) syndrome?
Delta wave
ExplanationWPW syndrome is identified by the presence of a delta wave on ECG.
#13
Which of the following is a characteristic feature of third-degree (complete) heart block?
Atrioventricular dissociation
ExplanationComplete heart block results in AV dissociation, with P waves occurring independently of QRS complexes.
#14
Which cardiac conduction disorder is characterized by an irregular, chaotic heart rhythm with no discernible P waves on ECG?
Ventricular Fibrillation
ExplanationVentricular Fibrillation presents as a chaotic rhythm with absent P waves on ECG.