Cardiac Assessment and ECG Quiz

What does one small box on ECG paper represent?

• 0.12 seconds

• 0.04 seconds

• 1 second

• 0.2 seconds

What is the normal running speed for recording an ECG?

• 50 mm/sec

• 25 mm/sec

• 10 mm/sec

• 15 mm/sec

What indicates appropriate atrial activity in an ECG?

• Presence of QRS complex

• Presence of T-wave

• R-wave consistency

• P-wave preceding every QRS complex

What does a QRS complex greater than 0.12 seconds indicate?

• Sinus bradycardia

• Normal conduction

• Atrial flutter

• Impulse arose within a ventricle

What is the heart rate range for sinus rhythm?

• 40 to 60 BPM

• 60 to 100 BPM

• 100 to 150 BPM

• 150 to 200 BPM

What characterizes sinus bradycardia?

• Rate less than 60 BPM

• Rate greater than 100 BPM

• Rate equal to 80 BPM

• Rate between 60 to 100 BPM

What is a key feature of atrial fibrillation?

• Consistent heart rate

• Visible P-waves

• Absence of true P-waves

• Regular R-R intervals

What does a QRS complex of normal duration indicate?

• Normal atrial activity

• Normal ventricular conduction

• Abnormal impulse conduction

• Presence of heart block

What is the characteristic of Mobitz I heart block?

• Fixed PR interval

• Progressively lengthening PR intervals

• No P-waves present

• Consistent QRS complexes

What does a third-degree AV block indicate?

• Presence of P-waves only

• Independent contraction of atria and ventricles

• Normal conduction from atria to ventricles

• Prolonged PR interval