PubMed · 14449765
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C A HUFNAGEL. 1961. Aortic insufficiency.. https://doi.org/10.1016/s0033-0620(61)80019-4
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A method has been developed for applying water pressure to a closed mitral valve on the side corresponding to the heart's left ventricle. The pressure is increased until fluid flows through the valve, i.e. until it fails. A specific dissection technique has been developed to produce a specimen with two annular rings, mitral annulus and papillary muscle annulus. Since the valve is maintained intact, with its leaflets attached to papillary muscles by the chordae tendineae, this method allows the effects of ruptured chordae and their surgical repair or replacement to be assessed in vitro. The chamber that holds the valve supports both the mitral annulus and papillary muscle annulus of the specimen. The mitral annulus is sutured onto rubber sheeting held in the chamber. The papillary muscle annulus is held in place by a Perspex support. The main part of the apparatus consists of a water pump connected through flexible tubing to the chamber that holds the valve in place. The pressure at failure is measured using a pressure transducer. Preliminary experiments demonstrate that anterior leaflet marginal chordae, but not strut chordae, are vital to valve function. Posterior leaflet chordae have been found to be important for valve competence.
BACKGROUND: The Ross procedure is commonly used to treat aortic valve disease in pediatric and adult patients. For infants, data are limited regarding survival, reintervention, autograft growth, and function. METHODS AND RESULTS: The Ross procedure was performed in 27 infants <18 months of age (median age 5.7 months). All patients had congenital aortic stenosis (AS); associated lesions included subAS (n=9), supravalvular AS (n=2), coarctation (n=5), and interrupted aortic arch (n=2). Median follow-up was 6.1 years (range 0.2 to 12.9). There were 3 early deaths and no late deaths. Freedom from reintervention for homograft dysfunction was 87% at 8 years; freedom from autograft reintervention was 100%. Follow-up echocardiograms were available in 17 patients. Estimated peak autograft gradient was 55 mm Hg in one patient and <10 mm Hg in 16. Mild autograft insufficiency was seen in 4 patients; 13 had none. Autograft diameter was measured early postoperatively and at latest follow-up. The mean z score increased from 0.63 to 3.2 (P<0.01) at the annulus and from 0.26 to 2.2 (P<0.01) at the sinus. In a subgroup, the mean autograft z score increased significantly from the postoperative period to 1 year for both the annulus (0.72 to 3.2, P<0.01) and the sinus (0.26 to 2.2, P<0.01), but remained unchanged thereafter. CONCLUSIONS: The Ross procedure effectively relieves AS in infants. Homograft reintervention occurred in 13% within 8 years. No patient developed significant autograft insufficiency or required autograft reintervention during the follow-up period. Dilatation of the autograft occurred during the first year after surgery and stabilized thereafter.
The objective of the study was to evaluate the association between heart valve calcification and atherosclerosis and outcome in systemic lupus erythematosus (SLE). One-hundred and seven patients with SLE (mean age 45.9 +/- 14.7 years) were studied by 2D transthoracic echocardiography. Mitral annulus calcification (MAC) was detected in 24 patients (22.6%) and aortic valve calcification (AVC) in 22 (20.1%). Both MAC and AVC were associated with older age (r = 0.2, p = 0.02; r = 0.40, p <or= 0.001, respectively), high SLE damage index (r = 0.3, p = 0.005; r = 0.40, p = 0.001, respectively), diabetes mellitus (r = 0.2, p = 0.05; r = 0.3, p = 0.003, respectively), hyperlipidemia (r = 0.03, p = 0.01; r = 0.03, p = 0.001, respectively), hypertension (r = 0.20, p = 0.07; r = 0.20, p = 0.08, respectively), serum IgA isotype of anticardiolipin antibody (r = 0.03, p = 0.03; r = 0.04, p = 0.02, respectively), increased serum creatinine (r = 0.03, p = 0.0005; r = 0.12, p = 0.02, respectively), and stroke (r = 0.3, p = 0.0008; r = 0.35, p = 0.0002, respectively). In addition, MAC was associated with coronary artery disease (r = 0.2, p = 0.05). Both MAC and AVC were significantly associated with death during the follow-up period (n = 9, 8.6%) (r = 0.20, p = 0.05; r = 0.20, p = 0.03, respectively). On stepwise logistic regression analysis, MAC and AVC are independently associated with hyperlipidemia and antiphospholipid antibodies. In conclusion, MAC and AVC are prevalent among young SLE patients, positively correlate with premature diffuse atherosclerosis, and are a risk factor for subsequent all-cause mortality.