2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Circulatory System 390-459 > Other Forms Of Heart Disease 420-429 > Ill-Defined Descriptions And Complications Of Heart Disease 429.* > 2006 ICD-9-CM Diagnosis 429.3 Cardiomegaly View the most recent version of ICD-9-CM 429.3 Enlargement of the HEART due to chamber HYPERTROPHY, an increase in wall thickness without an increase in the number of cells (MYOCYTES, CARDIAC). It is the result of increase in myocyte size, mitochondrial and myofibrillar mass, as well as changes in extracellular matrix. Enlargement of the HEART, usually indicated by a cardiothoracic ratio above 0.50. Heart enlargement may involve the right, the left, or both HEART VENTRICLES or HEART ATRIA. Cardiomegaly is a nonspecific symptom seen in patients with chronic systolic heart failure (HEART FAILURE, CONGESTIVE) or several forms of CARDIOMYOPATHIES. 429.3 is a specific code that can be used to specify a diagnosis 429.3 contains 10 index entries View the ICD-9-CM Volume 1 429.* hierarchy Alternate Terminology Cardiac: dilatation hypertrophy Ventricular dilatation 429.3 Excludes that due to hypertension (402.0-402.9)  Index entries containing 429.3: Athlete's heart 429.3 Cardiomegaly (see also Hypertrophy, cardiac) 429.3 congenital 746.89 glycogen 271.0 hypertensive (see also Hypertension, heart) 402.90 idiopathic 425.4 Dilatation cardiac (acute) (chronic) (see also Hypertrophy, cardiac) 429.3 congenital 746.89 valve NEC 746.89 pulmonary 746.09 hypertensive (see also Hypertension, heart) 402.90 heart (acute) (chronic) (see also Hypertrophy, cardiac) 429.3 congenital 746.89 hypertensive (see also Hypertension, heart) 402.90 valve - see also Endocarditis congenital 746.89 myocardium (acute) (chronic) (see also Hypertrophy, cardiac) 429.3 ventricular, ventricle (acute) (chronic) (see also Hypertrophy, cardiac) 429.3 cerebral, congenital 742.4 hypertensive (see also Hypertension, heart) 402.90 Enlargement, enlarged - see also Hypertrophy heart, cardiac (see also Hypertrophy, cardiac) 429.3 Hypertrophy, hypertrophic cardiac (chronic) (idiopathic) 429.3 with rheumatic fever (conditions classifiable to 390) active 391.8 with chorea 392.0 inactive or quiescent (with chorea) 398.99 congenital NEC 746.89 fatty (see also Degeneration, myocardial) 429.1 hypertensive (see also Hypertension, heart) 402.90 rheumatic (with chorea) 398.99 active or acute 391.8 with chorea 392.0 valve (see also Endocarditis) 424.90 congenital NEC 746.89 myocardium (see also Hypertrophy, cardiac) 429.3 idiopathic 425.4 Preponderance, left or right ventricular 429.3