Cardiovascular Involvement by Systemic Diseases


Numerous systemic diseases can affect the heart and great vessels and are important causes of cardiac dysfunction. These systemic diseases include both prenatal and postnatal toxic and infectious exposures ( e-Fig. 81.1 ); adverse effects of therapeutic agents; and various nutritional, metabolic, inflammatory, granulomatous, and autoimmune entities. Endocrine, circulatory, and blood disorders frequently have secondary cardiac effects. Primary cardiac tumors can occur in association with underlying systemic disorders; although rare, neoplasms elsewhere can metastasize to the heart or locally invade the great vessels or pericardium. Congenital and acquired neurologic and musculoskeletal conditions that affect the chest are associated with structural and functional cardiac abnormalities.

e-Figure 81.1
Fetal alcohol syndrome and aortic coarctation in a 4-year-old boy.
(A) Chest radiograph shows a prominent aortic arch and descending aorta. Notching of the posterior left sixth rib (arrow) from an intercostal aortic collateral vessel is present. (B) Oblique sagittal three-dimansional MRA image demonstrates marked coarctation of the aorta (arrow) distal to the left subclavian artery. Multiple large intercostal collateral vessels are present, as well as enlarged internal mammary collaterals (arrowhead).

These entities and the spectrum of their cardiac effects are outlined in Table 81.1 . We have included both common diseases that have cardiovascular features and uncommon lesions in which cardiovascular manifestations are prominent. A small number of selected entities are discussed in the following sections. Many of the lesions outlined in Table 81.1 overlap with other chapters and thus are not specifically discussed here.

TABLE 81.1
Cardiovascular Manifestations of Systemic Diseases or Disorders
Disease or Disorder Category Cardiovascular Manifestations
T oxins /D rugs
Carbon monoxide Tachycardia, noncardiogenic pulmonary edema
Doxorubicin (Adriamycin) Cardiomyopathy, CHF
Fetal alcohol exposure ( e-Fig. 81.1 ) ASD, VSD, PDA, COA, arch interruption, PA hypoplasia, DORV, DEXTRO, TOF
HAART (used to treat HIV) Cardiomyopathy, CHF
Iron Cardiomyopathy, CHF
Lead Myocarditis, atherosclerosis
Radiation Cardiomyopathy, MI, pericarditis, valvular disease, especially aortic
Steroids (chronic) Cardiomyopathy, CHF, cardiomegaly
Theophylline Arrhythmias
M etabolic
Alkaptonuria CAD, aortic and mitral valvulitis
Amyloidosis Cardiomyopathy, CHF, arrhythmias
Carnitine deficiency Dilated cardiomyopathy, CHF, endocardial fibroelastosis
Fabry disease Cardiomyopathy, mitral valve disease, thromboembolism, arrhythmias, coronary aneurysm
Glycogen storage disease
Type II (Pompe disease) Cardiomyopathy, CHF, outflow tract obstruction
Type III Hypertrophic cardiomyopathy
Type IV Dilated cardiomyopathy
Danon disease (lysosomal glycogen-storage disease) Hypertrophic cardiomyopathy
Hemochromatosis Cardiomyopathy, arrhythmia, CHF
Gaucher disease (cerebroside lipidosis) Cardiomyopathy, MR, MS, AS, coagulopathy
GM1 gangliosidosis Infantile cardiomyopathy
Homocystinuria Vascular stenoses and occlusions, aneurysms, thromboembolic episodes
Long-chain acetyl CoA dehydrogenase deficiency Cardiomyopathy
Mucolipidosis III AR, cardiomyopathy
Mucopolysaccharidosis
IH (Hurler syndrome) Acute cardiomyopathy associated with endocardial fibroelastosis, AR, MR, coronary narrowing
IS (Scheie) AS, MS
II (Hunter syndrome) AR
III (Sanfilippo syndrome) Functional and morphologic mitral valve deterioration
IV (Morquio syndrome) AR, MR, CAD
VI (Maroteaux–Lamy syndrome) AS, MS
Oncocytic (histiocytoid) cardiomyopathy (infantile histiocytic cardiomyopathy, Purkinje cell tumor, focal lipid cardiomyopathy, idiopathic infantile cardiomyopathy) Cardiomyopathy, ASD, VSD, nodular deposits on the ventricular endocardium or valves
Pseudoxanthoma elasticum Premature atherosclerosis, MI, restrictive cardiomyopathy, mitral valve disease, AO dilation, vascular, coronary occlusions
Refsum disease (phytanic acid α-oxidase deficiency) CHF, cardiomyopathy, conduction abnormality
Sitosterolemia (inherited plant sterol storage disease) CAD, MI, CHF
Uremia Pericardial effusion, constrictive pericarditis, CHF, cardiomyopathy
G ranulomatous
Histoplasmosis Pericardial effusion, tamponade, AR, endocarditis, fibrosing mediastinitis
Sarcoid Infiltrative cardiomyopathy, pericardial effusion, papillary muscle dysfunction, valvular disease, fibrosing mediastinitis, large-vessel vasculitis
Tuberculosis Myocarditis, ventricular aneurysms, calcific/constrictive pericarditis, fibrosing mediastinitis, vasculitis
Wegener granulomatosis Pulmonary vasculitis, pericarditis, coronary arteritis, MI
I nfectious /I nflammatory /A utoimmune /C onnective T issue D isorders
Aortitis (infectious) ( Fig. 81.2 ) Abscess, aneurysm, leak, pseudoaneurysm, rupture
Behçet syndrome Aortic, pulmonary and coronary vasculitis and aneurysms, cardiac valvular vegetations
Chagas disease (Trypanosoma cruzi) Myocarditis, CHF, apical aneurysm
Dermatomyositis Cardiomyopathy
Diphtheria Cardiomyopathy, myocarditis
Enterovirus (Coxsackie B) Myocarditis
Fetal rubella infection PDA, pulmonary artery stenosis, COA, ASD, VSD, myocarditis, cardiomyopathy
HIV Cardiomyopathy, CHF
Juvenile rheumatoid arthritis Pericarditis, myocarditis, CHF
Kawasaki disease Coronary artery aneurysm, coronary thrombosis, MR, papillary muscle dysfunction, MI, myocarditis, CHF, pericarditis, AR, systemic vasculitis
Polyarteritis nodosa Cardiomyopathy, pericarditis, coronary artery aneurysms, MI, systemic vasculitis
Relapsing polychondritis CM, AO dilation/aneurysm, AR, TR, MR
Rheumatic fever Pancarditis, valve insufficiency, CHF, valvular stenosis (MS, AS, TS), atrial dilation, left atrial thrombus, constrictive pericarditis
Scleroderma CM, pericarditis, myocarditis, conduction abnormality, cor pulmonale
Systemic lupus erythematosus Pericarditis, cardiomyopathy, Libman-Sacks endocarditis, heart block, endocardial fibroelastosis, systemic/coronary vasculitis
Takayasu arteritis ( Fig. 81.3 , e-Fig. 81.4 , and Fig. 81.5 ) Widened mediastinum, AR, CHF, myocarditis, aortitis, pulmonary/coronary vasculitis, aneurysms, stenoses
Toxoplasmosis Myocarditis
M alnutrition
Anorexia Decreased ventricular mass, MVP
Bulimia Arrest, cardiac rupture, pneumomediastinum
Marasmus Thinning of cardiac muscle, CHF, CHD
Obesity CM, pulmonary hypertension, early atherosclerotic disease
Selenium deficiency (Keshan disease) Congestive cardiomyopathy, cardiogenic shock, CHF
Vitamin B 1 (thiamine) deficiency (beriberi) Cardiomyopathy, CHF
C ardiac T umors A ssociated W ith S ystemic D isease
Fibromas (in Beckwith Wiedemann syndrome, nevoid basal cell carcinoma syndrome, or Gorlin syndrome) Cardiomyopathy, CHF, mass most commonly originates at the intraventricular septum, occasional calcification in the tumor
Myxomas (in Carney complex, LAMB/NAME syndrome) ( e-Fig. 81.9 ) Attached to atrial septum and mitral apparatus in LA, can prolapse or embolize, multiple, can occur in any cardiac chamber, can recur at distant intracardiac and extracardiac sites, intracardiac valvular obstruction leading to CHF
Rhabdomyomas (in tuberous sclerosis) Multiple intramural hamartomas, present in utero, abnormal valve function, outflow obstruction, cardiomyopathy, spontaneously regress
M etastases
Lymphoma Great vessel obstruction, SVC syndrome, CHF, pericardial infiltration
Wilms tumor (hepatoblastoma less commonly) ( e-Fig. 81.10 ) IVC extension, CHF, cardiomyopathy
E ndocrine
Cushing disease Cardiomyopathy, blood vessel fragility
Diabetes (acquired) Early CAD
Diabetes, gestational (infant of a diabetic mother) ( Fig. 81.6 ) Cardiomyopathy, cardiovisceral or atrioventricular discordance, outflow tract anomalies, TGA, AVSD, DiGeorge complex
Gigantism/acromegaly Cardiac hypertrophy, LVH
Hyperthyroidism CHF, cardiomyopathy
Hypothyroidism Pericardial effusion, CHF
C irculatory /B lood D isorders
Arteriovenous fistula (especially vein of Galen malformation, HHT, and infantile hepatic hemangioma) ( e-Fig. 81.11 ) CHF, high output; HHT: skin, visceral, single or multiple pulmonary AVM, angiodysplasia, coronary ectasia, Kasabach Merritt syndrome (platelet trapping and consumptive coagulopathy)
Fanconi anemia PDA, VSD, peripheral PS, cardiomyopathy, ASD, TOF, AS, COA, AO atheromas, hypoplastic AO, double AO arch
Hepatopulmonary syndrome (chronic liver disease, hypoxemia, clubbing) Pulmonary capillary microshunts, vasodilation, CHF—high output
Portopulmonary syndrome (Abernethy malformation): hepatopulmonary syndrome with no liver disease, portosystemic shunting Type I abnormal portal-systemic connection; absent intrahepatic portal vein; associated with VSD, AO arch anomalies
Type II abnormal portal-systemic connection; intrahepatic portal vein present
Leukemia SVC syndrome, cardiomyopathy, CHF, pericardial effusion
Polycythemia vera MI, arterial and venous clots, CHF
Sickle cell disease ( Fig. 81.7 ) Cardiomyopathy, MI, acute chest syndrome, CHF, vascular thromboses
Thalassemia ( Fig. 81.8 ) CHF, cardiomyopathy, iron overload
Twin-to-twin transfusion Shared placental circulation leads to unbalanced flow; CM and CHF may develop in both the anemic and the polycythemic twin
M usculoskeletal /N eurologic
Abetalipoproteinemia Arrhythmia, cardiomyopathy, CHF
Duchenne muscular dystrophy Cardiomegaly, progressive cardiomyopathy, conduction abnormalities, CHF, MVP
Friedreich ataxia (spinocerebellar degeneration) CM, cardiomyopathy, CHF, cardiac thrombus
Kyphoscoliosis Cardiac, vascular, and airway displacement and compression
Osteogenesis imperfecta MVP, AR, enlarged AO root
Pectus excavatum Cardiac displacement, MVP, anterior compression of right ventricle
AO, Aorta/aortic; AR, aortic regurgitation; AS, aortic stenosis; ASD, atrial septal defect; AVM, arteriovenous malformation; AVSD, atrioventricular septal defect; CAD, coronary artery disease; CHD , congenital heart disease; CHF, congestive heart failure; CM, cardiomegaly; CoA, coenzyme A; COA, aorta coarctation; DEXTRO, dextrocardia; DORV, double-outlet right ventricle; HAART, highly active antiretroviral therapy; HHT, hereditary hemorrhagic telangiectasia; HIV, human immunodeficiency virus; IVC, inferior vena cava; LA, left atrium; LAMB, lentigines, atrial myxoma, mucocutaneous myxomas, blue nevi; LVH, left ventricular hypertrophy; MI, myocardial infarction; MR, mitral regurgitation; MS, mitral stenosis; MVP, mitral valve prolapse; NAME, nevi, atrial myxoma, myxoid neurofibromas, ephelides; PA, pulmonary artery; PDA, patent ductus arteriosus; PS, pulmonary stenosis; SVC, superior vena cava; TGA, transposition of great arteries; TOF, tetralogy of Fallot; TR, tricuspid regurgitation; TS, tricuspid stenosis; VSD, ventricular septal defect.

Infectious, Inflammatory, and Autoimmune Disorders

Infectious Aortitis

Overview.

Acute infectious aortitis in children is usually caused by bacterial septicemia originating from infected lines and intravascular devices and from valvular endocarditis or occasionally by direct spread from an adjacent infection or abscess. Staphylococci and streptococci are the organisms most frequently responsible for acute infectious aortitis. Predisposing conditions include congenital heart disease and an immunocompromised state. Once they are in the bloodstream, virulent organisms may adhere to and invade the aortic wall. The resulting inflammation leads to suppurative necrosis that weakens the aortic wall and forms an aneurysm ( Fig. 81.2A ). A contained leak may lead to pseudoaneurysm formation ( Fig. 81.2B ). Staphylococcal aortitis is particularly prone to aneurysm or pseudoaneurysm rupture and is the most serious complication of infectious aortitis. Fungi, especially Aspergillus or Candida, also may be the cause of infectious aortitis, especially in immune-compromised individuals. Syphilitic and tuberculous aortic aneurysms are rare complications of chronic infection by those organisms and are very uncommon in children.

Diagnosis of infectious aortitis is difficult because presenting symptoms are often minor or nonspecific, such as fever and abdominal or back pain. Common laboratory markers of infection can be normal. One adult study showed that blood cultures were negative in 28% of cases and white blood cell counts were normal in 42% of cases; however, an elevated erythrocyte sedimentation rate, a nonspecific finding of inflammation, was found in 92% of patients.

Imaging.

Few clinical studies have evaluated the imaging appearance and distribution of infected aortic aneurysms in children. Experience from adult patients suggests that these aneurysms are more often saccular (93%) than fusiform (7%) and can be distributed throughout the course of the aorta: 6% in the ascending aorta, 23% in the descending thoracic aorta, 19% in the thoracoabdominal aorta, 10% in the juxtarenal aorta, and 32% in the infrarenal aorta. Periaortic fluid, stranding, or a soft tissue mass was present in 48% of patients with infectious aortitis. Periaortic gas, a specific sign, was present in only 7%. Rapid progression of aneurysm size was found in infected aneurysms in both adults and children. Computed tomography angiography (CTA) and magnetic resonance angiography (MRA) imaging have largely supplanted conventional angiography in the diagnosis of aortic aneurysms and their complications (see Fig. 81.2 ). Ultrasound may be an initial screening examination but usually is not definitive enough to support management decisions.

Figure 81.2, Infectious aortitis.

Treatment.

Antibiotic treatment with the goal of eradicating the offending organism is the first step in the treatment of infectious aortitis. At the same time, imaging to document stability of the aortic lumen is necessary. If an aneurysm has formed, it should be surgically repaired after an adequate period of antibiotic treatment. Deployment of endovascular stent grafts in infected aortic aneurysms has been attempted. Although this is not considered a treatment of choice, it may be useful to act as a bridge to open surgical repair, especially in the presence of low-virulence organisms or rapidly expanding aneurysms.

Takayasu Arteritis

Overview.

Takayasu arteritis, also known as pulseless arteritis, is a chronic inflammatory arteritis of large vessels. The aorta is most commonly involved: 59% to 75% of cases affect the abdominal aorta and branches, and 40% to 56% of cases involve the thoracic aorta. Pulmonary and coronary arteries can also be involved. Takayasu arteritis is a rare disease, occurring in 2.6 per 1 million people in North America. It is more common in patients of Asian descent, and females make up 80% to 90% of patients.

The diagnosis of Takayasu arteritis is based on patient symptoms, physical findings, clinical laboratory values, serologic markers, and vascular findings. The American College of Rheumatology criteria include arm or leg claudication, age less than 40 years, a blood pressure difference between extremities of greater than 10 mm Hg, a subclavian or aortic bruit, a decreased brachial artery pulse, and aortic or branch narrowing. Three of these criteria provide a diagnosis of Takayasu arteritis with a sensitivity of 90.5% and a specificity of 97.8%. Other clinical manifestations of Takayasu arteritis that are not specific diagnostic criteria include fever, headache, stroke, postural dizziness, arthralgias, weight loss, myalgias, and systemic or pulmonary hypertension.

Takayasu arteritis has a triphasic pattern: a systemic nonvascular phase, a vascular inflammatory phase, and a quiescent “burnt-out” phase, although the inflammatory and fibrotic changes often overlap. In children, the correct diagnosis is frequently delayed, especially when systemic symptoms predominate.

The lesions of Takayasu arteritis are segmental with a patchy distribution. The vasculitis can lead to stenosis, occlusion, and aneurysm formation. Severe stenosis or occlusive thrombosis of the pulmonary vasculature may lead to pulmonary infarction and pulmonary hypertension. Cardiac symptoms include aortic regurgitation, dilated cardiomyopathy, myocarditis, pericarditis, congestive heart failure, and myocardial ischemia.

Etiology and Classification.

The specific cause of Takayasu arteritis is unknown, but it is probably a T-cell–mediated autoimmune process. Infection, particularly tuberculosis, has been linked to the development of Takayasu arteritis, especially in children. The diseased vessel wall is thickened and shows granulomatous changes from the adventitia to the media. Giant cell (or temporal) arteritis has an identical pathologic appearance to Takayasu arteritis but affects an older population and typically involves the temporal artery.

Takayasu arteritis currently is divided into six types depending on the location of aortic involvement. Coronary (C+) or pulmonary (P+) involvement may occur in all types ( Fig. 81.3 ).

Figure 81.3, Classification schema of Takayasu arteritis.

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