Mm

F Rate: Normal (60-100 bpm)

k Rhythm: Irregular

H P Waves: At least three different forms, determined by the focus in the atria

| PR Interval: Variable; determined by focus

Multifocal Atrial Tachycardia (MAT)

■ This form of WAP is associated with a ventricular response of >100 bpm.

■ MAT may be confused with atrial fibrillation (A-fib); however, MAT has a visible P wave.

Rate: Fast (>100 bpm) Rhythm: Irregular

P Wave: At least three different forms, determined by the focus in the atria PR Interval: Variable; depends on focus QRS: Normal (0.06-0.10 sec)

y Clinical Tip: MAT is commonly seen in patients with COPD but may also occur in acute MI.

Premature Atrial Contraction (PAC)

■ A single complex occurs earlier than the next expected sinus complex.

■ After the PAC, sinus rhythm usually resumes.

Sinus Rhythm With Pac

Rhythm: Irregular whenever a PAC occurs P Waves: Present; in the PAC, may have a different shape I PR Interval: Varies in the PAC; otherwise normal (0.12-0.20 sec) I QRS: Normal (0.06-0.10 sec)

§ y Clinical Tip: In patients with heart disease, frequent PACs may precede paroxysmal © supraventricular tachycardia (PSVT), A-fib, or A-flutter.

Atrial Tachycardia

■ A rapid atrial rate overrides the SA node and becomes the dominant pacemaker.

■ Some ST wave and T wave abnormalities may be present.

Can Psvt Irregular Pts With Afib

Rate: 150-250 bpm Rhythm: Regular

P Waves: Normal (upright and uniform) but differ in shape from sinus P waves PR Interval: May be short (<0.12 sec) in rapid rates QRS: Normal (0.06-0.10 sec) but can be aberrant at times

Supraventricular Tachycardia (SVT)

■ This arrhythmia has such a fast rate that the P waves may not be seen.

Rate: 150-250 bpm Rhythm: Regular

P Waves: Frequently buried in preceding T waves and difficult to see PR Interval: Usually not possible to measure

QRS: Normal (0.06-0.10 sec) but may be wide if abnormally conducted through ventricles y Clinical Tip: SVT may be related to caffeine intake, nicotine, stress, or anxiety in healthy adults.

Paroxysmal Supraventricular Tachycardia (PSVT)

■ PSVT is a rapid rhythm that starts and stops suddenly.

■ For accurate interpretation, the beginning or end of the PSVT must be seen.

■ PSVT is sometimes called paroxysmal atrial tachycardia (PAT).

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Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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Responses

  • Sampsa Vuorela
    Can psvt be irregular in pts with afib?
    9 years ago

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