2007 ICD-9-CM Diagnosis 426.* : Conduction disorders

Free Online ICD-9-CM Diagnosis Codes > 2007 > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Conduction disorders 426.* > 
2007 ICD-9-CM Diagnosis Code 426 Conduction disorders
2007 ICD-9-CM Diagnosis Code 426.0Atrioventricular block complete
Complete failure of atrial electrical impulse conduction through the AV node to the ventricles.
Complete failure of atrial electrical impulse conduction through the AV node to the ventricles. (NCI)
2007 ICD-9-CM Diagnosis Code 426.1 Atrioventricular block other and unspecified
2007 ICD-9-CM Diagnosis Code 426.10Atrioventricular block unspecified
A delay or failure in the conduction of a cardiac impulse from the atria to the ventricles at the level of the atrioventricular node.
2007 ICD-9-CM Diagnosis Code 426.11First degree atrioventricular block
A delay in the time required for the conduction of an electrical impulse through the atrioventricular (AV) node beyond 0.2 seconds; prolongation of the PR interval beyond 200 milliseconds.
A delay in the time required for the conduction of an electrical impulse through the atrioventricular (AV) node beyond 0.2 seconds; prolongation of the PR interval beyond 200 milliseconds. (NCI)
A PR interval of more than 0.20 seconds in adults.
A PR interval of more than 0.20 seconds in adults. (NCI)
2007 ICD-9-CM Diagnosis Code 426.12Mobitz (type) ii atrioventricular block
Intermittent failure of atrial electrical impulse conduction through the atrioventricular (AV) node to the ventricles, characterized by a relatively constant PR interval prior to the block of an atrial impulse.
2007 ICD-9-CM Diagnosis Code 426.13Other second degree atrioventricular block
Intermittent failure of atrial electrical impulse conduction through the atrioventricular (AV) node to the ventricles.
Intermittent failure of atrial electrical impulse conduction through the atrioventricular (AV) node to the ventricles. (NCI)
Intermittent failure of atrial electrical impulse conduction through the atrioventricular (AV) node to the ventricles, characterized by a progressively lengthening PR interval prior to the block of an atrial impulse.
2007 ICD-9-CM Diagnosis Code 426.2Left bundle branch hemiblock
An impairment of transmission of the cardiac electrical impulse along the fibers of the left anterior fascicle. In left anterior fascicular block (LAFB) the posteroinferior regions of the left ventricular endocardium are activated abnormally before the anterosuperior left ventricular area. After emerging from the posteroinferior division of the left bundle branch, the impulse first propagates in an inferior, rightward, and usually anterior direction for a short period of time. This orientation is responsible for the small q waves in leads I and aVL and for the r waves in leads II, III, and aVF.
An impairment of transmission of the cardiac electrical impulse along the fibers of the left anterior fascicle. In left anterior fascicular block (LAFB) the posteroinferior regions of the left ventricular endocardium are activated abnormally before the anterosuperior left ventricular area. After emerging from the posteroinferior division of the left bundle branch, the impulse first propagates in an inferior, rightward, and usually anterior direction for a short period of time. This orientation is responsible for the small Q waves in leads 1 and aVL and for the R waves in leads II, III, and aVF. (NCI)
An impairment of transmission of the cardiac electrical impulse along the fibers of the left posterior fascicle. In pure left posterior fascicular block (LPFB), the impulse emerges from the unblocked anterosuperior division, thus producing small q waves in leads II, III, and aVF. Thereafter, the impulse moves through the electrically predominant left ventricle in an inferior and rightward direction, thus explaining the S waves in leads I and aVL as well as the R waves in leads II, III, and aVF.
An impairment of transmission of the cardiac electrical impulse along the fibers of the left posterior fascicle. In pure left posterior fascicular block (LPFB), the impulse emerges from the unblocked anterosuperior division, thus producing small q waves in leads II, III, and aVF. Thereafter, the impulse moves through the electrically predominant left ventricle in an inferior and rightward direction, thus explaining the S waves in leads I and aVL as well as the R waves in leads II, III, and aVF. (NCI)
2007 ICD-9-CM Diagnosis Code 426.3Other left bundle branch block
An impairment of transmission of the cardiac electrical impulse along the fibers of the left main bundle branch, or both the left anterior fascicle and left posterior fascicle. This conduction disturbance is characterized by wide (greater than 0.11s) QRS complexes. The diagnostic criteria consist of prolongation of the QRS complexes (over 0.11s) with neither a Q wave nor an S wave in lead V1 and in the "properly placed" V6. A wide R wave with a notch on its top ("plateau") is seen in these leads. In hearts with an electrical (and anatomic) vertical position a small Q wave may be seen in AVL in the absence of MI. Right chest lead V1 may or may not show an initial R wave, but the latter should be present in lead V2.
An impairment of transmission of the cardiac electrical impulse along the fibers of the left main bundle branch, or both the left anterior fascicle and left posterior fascicle. This conduction disturbance is characterized by wide (greater than 0.11s) QRS complexes. The diagnostic criteria consist of prolongation of the QRS complexes (over 0.11s) with neither a Q wave nor an S wave in lead V1 and in the properly placed V6. A wide R wave with a notch on its top (plateau) is seen in these leads. In hearts with an electrical (and anatomic) vertical position a small Q wave may be seen in AVL in the absence of MI. Right chest lead V1 may or may not show an initial R wave, but the latter should be present in lead V2. (NCI)
2007 ICD-9-CM Diagnosis Code 426.4Right bundle branch block
An impairment of transmission of the cardiac electrical impulse along the fibers of the right bundle branch. A " complete RBBB pattern" (with QRS duration > 0.11s) does not necessarily reflect the existence of a total conduction block in the right branch. This pattern only indicates that the entire or major parts of both ventricles are activated by the impulse emerging from the left branch. Thus, a significant degree of conduction delay ("high-grade" or "incomplete RBBB") can produce a similar pattern.
An impairment of transmission of the cardiac electrical impulse along the fibers of the right bundle branch. A "complete RBBB pattern" (with QRS duration > 0.11s) does not necessarily reflect the existence of a total conduction block in the right branch. This pattern only indicates that the entire or major parts of both ventricles are activated by the impulse emerging from the left branch. Thus, a significant degree of conduction delay ("high-grade" or "incomplete RBBB") can produce a similar pattern. (NCI)
2007 ICD-9-CM Diagnosis Code 426.5 Bundle branch block other and unspecified
2007 ICD-9-CM Diagnosis Code 426.50Bundle branch block unspecified
2007 ICD-9-CM Diagnosis Code 426.51Right bundle branch block and left posterior fascicular block
2007 ICD-9-CM Diagnosis Code 426.52Right bundle branch block and left anterior fascicular block
2007 ICD-9-CM Diagnosis Code 426.53Other bilateral bundle branch block
An electrocardiographic finding comprising right bundle branch block and left anterior fasicular block, or right bundle branch block and left posterior fasicular block. Defects occuring in two of the three divisions of the conduction system of the heart are considered bifasicular blocks. Technically left bundle branch block may be considered a bifasicular block.
An electrocardiographic finding comprising right bundle branch block and left anterior fascicular block, or right bundle branch block and left posterior fascicular block. Defects occuring in two of the three divisions of the conduction system of the heart are considered bifascicular blocks. Technically left bundle branch block may be considered a bifascicular block. (NCI)
2007 ICD-9-CM Diagnosis Code 426.54Trifascicular block
2007 ICD-9-CM Diagnosis Code 426.6Other heart block
A blockage of electrical conduction within the sinoatrial node resulting in the prolongation or failure (intermittent or complete) of impulse transmission from the sinoatrial node to the surrounding atrial tissue.
A blockage of electrical conduction within the sinoatrial node resulting in the failure of impulse transmission from the sinoatrial node. (NCI)
A blockage of electrical conduction within the sinoatrial node resulting in the failure of impulse transmission from the sinoatrial node.
2007 ICD-9-CM Diagnosis Code 426.7Anomalous atrioventricular excitation
association of paroxysmal tachycaria or atrial fibrillation and pre-excitation characterized by a short PR interval and a long QRS interval with a delta wave.
A type of ventricular pre-excitation resulting from the activation of an accessory pathway known as the Bundle of Kent. This pathway presents an abnormal electrical communication from the atria to the ventricles. Wolff-Parkinson-White syndrome is characterized by a short PR interval and a long QRS interval with a delta wave. (NCI)
2007 ICD-9-CM Diagnosis Code 426.8 Other specified conduction disorders
2007 ICD-9-CM Diagnosis Code 426.81Lown-ganong-levine syndrome
2007 ICD-9-CM Diagnosis Code 426.82Long qt syndrome
prolongation of Q-T interval combined with torsades de pointes and manifests as several different forms; may be acquired or congenital; may lead to serious arrhythmia and sudden cardiac death.
A ventricular arrhythmia characterized by syncopal episodes and a long QT interval, sometimes leading to sudden death due to paroxysmal ventricular arrhythmia. This arrhythmia is associated with a prolongation of repolarisation following depolarization of the cardiac ventricles. The prolongation of the Q-T interval combined with torsades de pointes manifests as several different forms; some may be acquired or congenital; some may lead to serious arrhythmia and sudden cardiac death. (NCI)
2007 ICD-9-CM Diagnosis Code 426.89Other specified conduction disorders
An electrocardiographic finding in which the electrical activity of the atria and ventricles are causally independent of one another. (NCI)
An electrocardiographic finding in which the electrical activity of the atria and ventricles are causally independent of one another.
2007 ICD-9-CM Diagnosis Code 426.9Conduction disorder unspecified
impairment of conduction in heart excitation; often applied specifically to atrioventricular heart block.
An impairment of transmission of the cardiac electrical impulse along the fibers normally responsible impulse propagation.
 425.*
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