What is ECG paper called?

The electrocardiogram (EKG) is the representation on paper of the electrical activity of the heart. The electrocardiogram paper is a graph paper where for every five small (1 mm) squares you can find a heavier line forming a larger 5 mm square.

ECG Paper. The ECG paper is a strip of graph paper with large and small grids. On the horizontal axis, each 1 mm square (the smallest square) represents 0.04 seconds, and each large square (5 mm) represents 0.2 seconds. On the vertical axis, each large square represents 0.5 mV.

Also Know, how do you record an ECG? Check out the ECG recording OSCE mark scheme here.

Recording the trace

  1. Turn the ECG machine on – ensure there is paper loaded.
  2. Double check all the electrodes are attached in the appropriate positions.
  3. Politely ask the patient to remain still and not talk during the recording – muscle activity interferes with the trace.

Keeping this in view, what do the squares represent on ECG paper?

ECG paper is a grid where time is measured along the horizontal axis. Each small square is 1 mm in length and represents 0.04 seconds. Each larger square is 5 mm in length and represents 0.2 seconds.

What is a ECG used for?

An ECG (electrocardiogram) records the electrical activity of your heart at rest. It provides information about your heart rate and rhythm, and shows if there is enlargement of the heart due to high blood pressure (hypertension) or evidence of a previous heart attack (myocardial infarction).

What is ECG paper speed?

The ECG paper speed is ordinarily 25 mm/sec. As a result, each 1 mm (small) horizontal box corresponds to 0.04 second (40 ms), with heavier lines forming larger boxes that include five small boxes and hence represent 0.20 sec (200 ms) intervals.

What is a normal ECG reading?

Normal range 120 – 200 ms (3 – 5 small squares on ECG paper). Normal range up to 120 ms (3 small squares on ECG paper). QT interval (measured from first deflection of QRS complex to end of T wave at isoelectric line). Normal range up to 440 ms (though varies with heart rate and may be slightly longer in females)

How do you determine ECG axis?

ECG Axis Interpretation Normal Axis = QRS axis between -30° and +90°. Left Axis Deviation = QRS axis less than -30°. Right Axis Deviation = QRS axis greater than +90°. Extreme Axis Deviation = QRS axis between -90° and 180° (AKA “Northwest Axis”).

How do you measure ECG waves?

The first measurement is known as the “P-R interval” and is measured from the beginning of the upslope of the P wave to the beginning of the QRS wave. This measurement should be 0.12-0.20 seconds, or 3-5 small squares in duration.

How do you count ECG boxes?

ECG Rate The Cardiac Ruler or Sequence Method: Count the number of big boxes between R waves and count using the following numbers: 300-150-100-75-60-50. The Six Second Method: Get 6 seconds of ECG tracing (i.e. 30 big boxes) and count the number of R waves that appear within that 6 second period and multiply by 10.

What is sinus rhythm in ECG?

Sinus rhythm (a.k.a. normal sinus rhythm) refers to the normal heart beat originating from the sinoatrial node. Sinus bradycardia occurs when the heart rate is less than 60 beats per minute and sinus tachycardia when the heart rates is greater than 100 beats per minute in the setting of a sinus P wave on the ECG.

What does a normal ECG look like?

Share on Pinterest An EKG displays P Waves, T Waves, and the QRS Complex. A “normal” EKG is one that shows what is known as sinus rhythm. Sinus rhythm may look like a lot of little bumps, but each relays an important action in the heart.

What does QRS mean?

The QRS complex represents the electrical impulse as it spreads through the ventricles and indicates ventricular depolarization. As with the P wave, the QRS complex starts just before ventricular contraction.

What is borderline ECG?

“Borderline” generally means that findings on a given test are in a range that, while not precisely normal, are not significantly abnormal either.

What is abnormal ECG?

An electrocardiogram (EKG) measures your heart’s electrical activity. Sometimes an EKG abnormality is a normal variation of a heart’s rhythm, which does not affect your health. Other times, an abnormal EKG can signal a medical emergency, such as a myocardial infarction (heart attack) or a dangerous arrhythmia.

What are the five steps to rhythm interpretation?

Rhythm Regularity. Carefully measure from the tip of one R wave to the next, from the beginning to the end of the tracing. Heart Rate Regular (Constant) Rhythms. Step 2-2. P wave Morphology (shape) PR interval (PRi) QRS complex. Rhythm Regularity. Heart Rate Regular (Constant) Rhythms.

How do you place a 3 lead ECG?

The recommended 3-wire ECG lead placement is as follows. Place RA (white) electrode under right clavicle, mid-clavicular line within the rib cage frame. Place LA (black) electrode under left clavicle, mid-clavicular line within the rib cage frame.

Where is lead1 placed?

The placement of the electrodes for the standard limb leads is shown in this figure. Lead I is constructed by comparing the left arm (as positive) to the right arm’s electrode (as negative) (as shown in the next figure). The zero point is in the center of the lead (indicated by the hash mark).

Can anxiety cause abnormal EKG?

Premature ventricular contractions is one of the manifestations of sympathetic over activity due to anxiety. However, anxiety might induce electrocardiographic (ECG) changes in normal person with normal heart, as in this documented case.