Watwaeto's Legacy

• unifocal PVC

• Bizzare shaped QRS

• absence of P wave

• Irregular contraction

• premature contraction

• Multifocal PVC

• Multiple shapes of QRS

• absence of p wave

• irregular contraction

• premature contraction

• Sinus tachycardia

• Regular rhythm

• p wave present

• ectopic focus

• Atrial Fibrillation

• Heart rate: A =350-650 BPM

• Heart rate: v= slow to rapid

• irregular rhythm

• Fibrillatory QRS (fine to course)

• PR internval absent

• QRS < 0.12 sec (120 ms)

• Atrial flutter

• Heart rate: A=220-430 BPM

• Heart rate: V<300 BPM

• Regular or variable rhythm

• Sawtoothed P wave

• PR interval absent

• QRS < 0.12 sec (120 ms)

• Ventricular Tachycardia

• Heart rate: <100 BPM

• Regular rhythm

• P wave absent or not related

• PR interval absent

• QRS >= 0.12 sec (120 ms)

• Ventricular Fibrillation

• Heart rate: 300-600

• Rhythm: extremely irregular

• P wave absent

• PR interval absent

• QRS: fibrillatory baseline

• extremely emergent

• Sinus bradycardia

• Heart rate <= 60 BPM

• Regular rhthm

• P wave before each qrs, identical

• PR interval: 0.12 - 0.20 sec (120-200 ms)

• QRS <= 0.12 sec (120 ms)

• First degree AV block

• P wave identical before each QRS

• PR interval > 0.20 sec (>200 ms)

• QRS >0.12 sec (>120 ms)

• Regular rhythm

• Second degree AV block

• Mobitz 1

• Wenckebach

• P wave: conduction intermittant

• PR interval : increasingly prolonged

• QRS < 0.12 sec

• QRS dropped in repeating pattern “missing”

• Third degree AV block (complete)

• P wave: normal but not related to QRS

• PR interval: absent

• QRS: absent

• No relationship between P & RS

• LBBB - Left bundle block branch

• QRS inverted and wide ( lead V1 ) ( W shaped )

• M - shaped QRS ( lead V6) and inverted & wide T-wave

• RBBB - Right bundle branch block

• M- shaped QRS in V1 (inverted)

• Inverted T-wave

• Deep S-wave in V6

• Interior MI (miocardial infarction)

• No ST elevation in leads ( II, III, VaF)

• Multiple ST elevations in leads V1 - V6 تلال كتييير

• Inferior MI

• ST Elevation (leads II, III, VaF) تلة تلة تلة هنا و هناك

• regular rhythm

• Absence of p-wave

1500 = no, of square / small squares

Lead I, II, III