In a patient suffering from obstructive cardiomyopathy (IHSS), the onset of septicaemia due to staphylococus aureus was accompanied: 1. by the appearance of massive mitral incompetence and of cardiac failure; 2. by a marked reduction in the left intra-ventricular pressure gradient; 3. by acute reversible renal failure (interstitial nephritis); 4. by a glomerulonephritis with immune complexes deposits. After the septicaemia had been treated, replacement of the mitral valve by a disc prosthesis of Lillehei was carried out. Twenty months after the operation, the patient was completely asymptomatic, and catheterisation showed that the left intra-venticular pressure gradient had disappeared, as had the haemodynamic signs of cardiac failure.
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