P waves on EKG

Question 1

A P wave on a EKG is________and it represents________________.

Answer 1

First component of the normal
ECG
represents atrial
depolarization

Question 2

A P wave precedes the ____________.

Answer 2

Precedes the QRS

Question 3

The amplitude of a P wave is__________.

Answer 3

Amplitude: 2-3 mm high

Question 4

The duration of a P wave is __________.

Answer 4

Duration: 0.06- 0.12

Question 5

The configuration of a P wave is __________.

Answer 5

Configuration: rounded and

upright

Question 6

The deflection of a P wave is upright in the following leads ___________.

Answer 6

Deflection: Upright in I, II,

aVf, V2 to V6

Question 7

The deflection of a P wave may vary in lead __________.

Answer 7

,
may vary in lead III and
aVl.

Question 8

P waves are inverted in lead__________.

Answer 8

inverted in aVr.

Question 9

A P wave is biphasic in lead__________.

Answer 9

V1

Question 10

Peaked notched or inverted P

waves may indicate__________.

Answer 10

atrial

hypertrophy.

Question 11

Inverted P wave may indicate__________.

Answer 11

Inverted P wave may indicate
retrograde conduction through
the AV junction.

Question 12

Varying P waves indicate the

impulse may be coming from__________.

Answer 12

different sites

Question 13

Absent P waves may indicate

initiation of impulse by tissue

Answer 13

SA node

Question 14

If P wave does not precede the

QRS,__________.

Answer 14

heart block may be present.