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The measurement of conduction time between the atria and ventricles is represented by the PR interval on electrocardiograms (ECG)

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Longer than normal and greater than 0.20 seconds

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The prolongation of the PRI >.02 seconds.

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A 1st Degree AV Block is when the heart is conducting abnormally slower at the AV node. The PR interval of a 1st Degree AV Block would be longer than 0.2 milliseconds or 5 small boxes. 

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A 1st Degree AV Block is when the heart is conducting abnormally slower at the AV node. The PR interval of a 1st Degree AV Block would be longer than 0.2 milliseconds or 5 small boxes. 

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Atrioventricular blocks are occasional non-conducted P waves with prolonged RR intervals.

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A complete failure of the AV node to conduct any impulses from the atria to the ventricles is the main feature of third-degree atrioventricular block.

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PR interval that's longer than 200 millimeters or .2 seconds

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PR interval that's longer than 200 millimeters or .2 seconds

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exists when there are more P waves than QRS complexes

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exists when there are more P waves than QRS complexes

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The prolongation of the PRI >.02 seconds.

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Total failure of the AV node from the atria to the ventricles is the main feature.The patient may suffer ventricular standstill that may result in sudden cardiac death. Pacemaker insertion is necessary to provide needed perfusion.

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A form of 2nd degree AV block in which there is intermittent non-conducted P waves without progressive prolongation of the PR interval

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A form of 2nd degree AV block in which there is intermittent non-conducted P waves without progressive prolongation of the PR interval

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There are no changes in the PR interval, even after non-conducted P wave

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There are no changes in the PR interval, even after non-conducted P wave

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 Mobitz II heart block is characterized on a surface ECG by intermittently non conducted P waves not preceded by PR prolongation and not followed by PR shortening.

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 Mobitz II heart block is characterized on a surface ECG by intermittently non conducted P waves not preceded by PR prolongation and not followed by PR shortening.

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P waves occur every 920 milliseconds and the RR interval is every 1240 milliseconds

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P waves occur every 920 milliseconds and the RR interval is every 1240 milliseconds

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The Mobitz type II AV block is secondary to a disease involving the His-Purkinje system, in which there is a failure to conduct impulses from the atria into the ventricles.

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Atrioventricular blocks are occasional non-conducted P waves with prolonged RR intervals. (Wenckebach) appears when there is an intermittent conduction block within the AV node.

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Prolongation of the PR interval of more than 200 milliseconds is considered to be a first-degree AV block.

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Prolongation of the PR interval of more than 200 milliseconds is considered to be a first-degree AV block.

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Mobitz type II has a higher risk of complete heart block compared to Mobitz type I.

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No changes to the PRI even after a non-conducted P wave occurs and RR intervals remain constant.

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PR interval that's longer than 200 millimeters 

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PR interval that's longer than 200 millimeters 

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there is a failure to conduct impulses from the atria into the ventricles.

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there is a failure to conduct impulses from the atria into the ventricles.

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Non-conducted P waves and prolonged RR intervals; failure of a conduction in the AV node results in a disappearance of the QRS complex.

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occurs when there is an intermittent conduction block within the AV node that results in a failure to conduct an impulse from the atria into the ventricles.

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It disappearance of the QRS complex in the ECG.

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It disappearance of the QRS complex in the ECG.

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non-conducted P waves with prolonged RR intervals

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non-conducted P waves with prolonged RR intervals

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The PR interval is more than 200 milliseconds.

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The PR interval is more than 200 milliseconds.

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there are no changes in the PR interval, even after the non-conducted P wave and has a higher risk of heart block 

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there are no changes in the PR interval, even after the non-conducted P wave and has a higher risk of heart block 

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2nd Degree Type II is characterized by a missing atrial impulse.

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2nd Degree Type II is characterized by a missing atrial impulse.

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failure of the AV node to conduct any impulses from the atria to the ventricles is the main feature of third-degree atrioventricular block.

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failure of the AV node to conduct any impulses from the atria to the ventricles is the main feature of third-degree atrioventricular block.

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Third-degree AV block (complete heart block).

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Third-degree AV block (complete heart block).

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RR interval is 1240 milliseconds and the P waves occur every 920 milliseconds

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RR interval is 1240 milliseconds and the P waves occur every 920 milliseconds

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2nd Degree Mobitz Type 1 is characterized by the failure to conduct in the AV node which results in a QRS complex disappearance.

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2nd Degree Mobitz Type 1 is characterized by the failure to conduct in the AV node which results in a QRS complex disappearance.

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The PR interval is about 7 small squares and the P waves are buried within the T waves.

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The PR interval is about 7 small squares and the P waves are buried within the T waves.

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AV nodal disease or a disease involving the His-Purkinje system caused by coronary artery disease

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AV nodal disease or a disease involving the His-Purkinje system caused by coronary artery disease

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disease involving the His-Purkinje system

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disease involving the His-Purkinje system

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the pri remains consistent across the strip the interval being greater than .02 milliseconds.

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occurs when there is an intermittent conduction block within the AV node

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occurs when there is an intermittent conduction block within the AV node

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3rd Degree AV Block is characterized by the failure of the AV node to conduct any impulses from the atria to the ventricles. There will be more P waves than QRS complexes in the rhythm.

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3rd Degree AV Block is characterized by the failure of the AV node to conduct any impulses from the atria to the ventricles. There will be more P waves than QRS complexes in the rhythm.

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 PR interval of more than 200 milliseconds is considered to be a first-degree AV block

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 PR interval of more than 200 milliseconds is considered to be a first-degree AV block

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intermittent conduction block within the AV node that results in failure to conduct an impulse from the atria into the ventricles

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Failure of conduction or loss of communication in the AV node; junctional or ventricular rhythms, Pacemaker insertion is typically provided for there to be coordination between the atria and the ventricle.

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When you look at a ECG strip you can see that there are problems occurring disease involving the His-Purkinje system caused by coronary artery disease. Having problems like this can cause a sudden cardiac death for the patient.

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When you look at a ECG strip you can see that there are problems occurring disease involving the His-Purkinje system caused by coronary artery disease. Having problems like this can cause a sudden cardiac death for the patient.

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The olongation of the PR interval of more than 200 milliseconds is characterized as a first-degree AV block. It can be due to the structural abnormalities within the AV node which is an increase in vagal tone, and drugs that slow conduction such as digoxin, beta-blockers.

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The olongation of the PR interval of more than 200 milliseconds is characterized as a first-degree AV block. It can be due to the structural abnormalities within the AV node which is an increase in vagal tone, and drugs that slow conduction such as digoxin, beta-blockers.

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the disease involves the his-purjunke system, where there is a failure to conduct impulses from the atria to the ventricles.

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It occurs when there is an intermittent conduction block within the AV node that results in a failure to conduct an impulse from the atria into the ventricles. 

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It occurs when there is an intermittent conduction block within the AV node that results in a failure to conduct an impulse from the atria into the ventricles. 

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complete failure of the AV node to conduct any impulses from the atria to the ventricles.

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There will be an absence of a QRS complex in the ECG.

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There will be an absence of a QRS complex in the ECG.

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The prolongation of the PRI >.02 seconds.

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A complete failure of the AV node to conduct any impulses from the atria to the ventricles is the main feature of third-degree atrioventricular block.

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Atrioventricular blocks are occasional non-conducted P waves with prolonged RR intervals.

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The measurement of conduction time between the atria and ventricles is represented by the PR interval on electrocardiograms (ECG)

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The measurement of conduction time between the atria and ventricles is represented by the PR interval on electrocardiograms (ECG). This component includes the intra-atrial conduction, represented by the P wave, and the conduction from the AV node into the His-Purkinje system. Prolongation of the PR interval of more than 200 milliseconds is considered to be a first-degree AV block.

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Mobitz type I (Wenckebach) occurs when there is an intermittent conduction block within the AV node that results in a failure to conduct an impulse from the atria into the ventricles

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The Mobitz type II AV block is secondary to a disease involving the His-Purkinje system, in which there is a failure to conduct impulses from the atria into the ventricles. A block occurs after the AV node within the bundle of His, or within both bundle branches

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A complete failure of the AV node to conduct any impulses from the atria to the ventricles is the main feature of third-degree atrioventricular block. There is AV dissociation and escape rhythms that may be junctional or ventricular, which represent perfusing rhythms.