Cardiac Conduction System Quiz

What is the primary purpose of an electrocardiogram (ECG)?

Which term is used to describe the measurement of electrical activity from the heart?

What produces the trace seen on the screen of a heart monitor during an ECG recording?

How many deflections above baseline are generally present in a 'standard trace' produced by an ECG recording?

What important component of the trace produced by an ECG recording tells us about heart function?

Besides quantifying heart rate, what can an ECG help detect?

What is the most severe type of heart block?

What does it mean when P-waves are not followed by QRS complexes?

What are escape QRS complexes indicative of?

Where does the heart become unstable if escape QRS complexes originate below?

What is the angle of lead II in electrocardiography (ECG)?

Which segment of the ECG represents the time of ventricular systole?

What does a normal sinus rhythm in ECG refer to?

What does sinus arrhythmia show up as on an ECG trace?

What indicates a wandering atrial pacemaker on an ECG trace?

What does the presence of wide QRS complexes on an ECG trace indicate?

Which type of heart block is characterized by slightly prolonged P-R distances?

What happens to the space in between beats in a trace showing bradycardia?

What does the angle of lead aVR in ECG indicate?

Which segment of the ECG can be used to calculate heart rate?

What do wide QRS complexes on an ECG trace indicate?

What does sinus arrhythmia show up as on an ECG trace?

What is the primary reason for the P-wave being significantly smaller than the QRS complex in an ECG?

What does the QRS complex on an ECG primarily reflect?

What does the T-wave on an ECG represent?

What causes a slight delay between the P-wave and the QRS complex on an ECG?

How do augmented unipolar limb leads differ from standard bipolar limb leads in an ECG?

What is the primary effect of any disease state that leads to growth of muscle mass in the ventricles on an ECG?

What is reflected as the first phase of the P-wave on an ECG?

Which component of an ECG trace reflects both similar and quite different traces compared to bipolar limb leads?

On an ECG trace, what does the flat segment between the P-wave and QRS complex reflect?

What is represented by a small downward deflection called the Q-wave on an ECG?

What reflects the final deflection on an ECG trace after the QRS complex, and represents ventricular repolarization?

On an ECG, what causes a significant difference between augmented unipolar limb leads and standard bipolar limb leads?

What does an ECG measure?

What is the mean axis through the middle of the heart in which electrical activity flows?

Which term refers to a slow heart beat?

Where are the electrodes placed for simple bipolar ECG limb leads?

What does Einthoven's Law state?

What is associated with the first, small deflection called the P-wave?

What does a wave of depolarization traveling toward the left leg appear as?

What change does an ECG reveal if the heart has undergone hypertrophy?

What does lead I cross through over the heart?

What disrupts a normal rhythm of the heart?

What can cause changes in the ECG according to the text?

What does a negative deflection appear as if a wave of depolarisation travels away from the left arm?