Class notes NUR 150 (MS)

Electrocardiogram(ECG) : 3. PR Interval
- Before P and ends before Q
PACE MAKER IN HEART - 0.12 – 0.20 sec (3 to 5 SB) NV
SA (Sinoatrial node) » 60-100 bpm 4. Rhythm
AV (Atrioventecular node) » 40-60 bpm - Regular- Irregular
5. Rate
NORMAL HEART SOUND - 1500/ # of SB (23)
S1- Clousure of atrioventecular ( mitral and - 65 bpm
tricuspid)
S2- Clousure of aortic and pulmonic valve
SINUS RHYTHM
- Present of P QRS T
- NV 60- 100 bpm
- ⬆ Tachycardia ⬇ Bradycardia

NORMAL SINUS RHYTHM

SINUS BRADYCARDIA
- Pumping too slow but regular
SINUS TACHYCARDIA
P wave - Atrial depolarization - Pumping too fast but regular
- Contraction of atrium (heart) SINUS ARRYTHMIA
- (irregular)
QRS - Ventricular depolarization SUPRAVENTRICULAR TACHYCARDIA
- Contraction of ventricles - ⬆150 (+) QRS (-) P/T

T wave - Repolarization of ventricle
- Relaxation

PR interval – Before P and before Q

ST interval – After S and ends after T ATRIAL FIBRILLATION
- (+) QRS (-) P

TO KNOW:

SB- Small box
NV- Normal Value
(+)- present
(-) – absent ATRIAL FLUTTER
⬆- increase - Saw tooth appearance
⬇- decrease - More than 3
- No P, Normal QRS
5 STEPS BASIC ECG READING

1. P wave
- Artrial depolarization
- 0.12 seconds(3 SB) NV

2. QRS
- Ventricular depolarization
- 0.12 sec (3 SB) AV BLOCKS/HEART BLOCKS – ALL
BRADYCARDIA


Prepared by: LAYSON, MA. JAZYLE D. SN.