CVS 2 (ECG)

regarding normal ECG, all of the following are true except:

• ST segment coincides with the plateau

• QRS complex represents ventricular depolarization

• S-wave represents depolarization of the ventricular apex

• p wave represents atrial depolarization

the duration of the shown wave equals:

• 80 m.sec

• 800 m.sec

• 400 m.sec

• 200 m.sec

normal ECG shows all the following except:

• p-wave

• ST segment

• PR interval

• U-wave

short PR interval:

• means tachycardia

• seen in Wolf Parkinson white S.

• seen in AV block

• seen in accessory bundle

regarding normal ECG, all of the following are true except:

• p-wave is positive in all leads

• atrial repolarization is not plotted on ECG

• T-wave represents ventricular RP

• PR segment represents AV nodal conduction

regarding ECG of PVC, all of the following is true except:

• QRS complex is bizarre in shape

• QRS is short in duration

• is an irregular irregularity not seen all through the ECG strip

• may be seen in normal people

regarding the wave marked in red, all are true except:

• absent in AF

• represents atrial DP

• peaked in AVN rhythm

• premature in PAC

regarding normal ECG segments:

• ST segment is elevated in MI

• PR segment coincides with the plateau

• PR segment's amplitude is 2 mV

• ST segment coincides with atrial contraction and AVN conduction

regarding normal ECG intervals:

• R-R interval is used to calculate HR

• PR interval is prolonged in ventricular tachycardia

• PR interval represents AVN conduction

• PR interval is from the end of P-wave till the end of R-wave

regarding aVR, all are true except:

• the only negative lead

• Augmented limb lead

• bipolar limb lead

• the rt arm is the +ve electrode