The prolapse had been leading to sciatica in the distribution of the S1 nerve root. However, he offers been troubled by recurrent episodes of mechanical back again pain, the most recent of which may be the worst and continues to be bothering him.. A man with back pain after a laminectomy This month, Dr Stephen describes a complete case of recurrent mechanical back pain occurring 12 weeks after a laminectomy. Does the display suggest a recurrent disk prolapse? Presentation A 45-year-old office worker presents to his doctor 12 months after a successful laminectomy for a lumbosacral disk prolapse on the still left side.However, all-cause mortality and cardiovascular mortality were higher in the ASV group than in the control group . One possible explanation for this is usually that central rest apnoea may actually be considered a compensatory mechanism in some heart failure patients, he suggested. ‘Potentially helpful consequences of central sleep apnoea in these sufferers could possibly be that it rests respiratory muscles, and modulates excessive sympathetic nervous system activity, and by diminishing this effect ASV may be detrimental for individuals with heart failure.’ Although SERVE-HF did not meet its major endpoint, ‘it had been a well-designed and executed study,’ concluded Professor Cowie, ‘and because of it we now understand that ASV therapy is contraindicated in this subset of persistent heart failure patients.’..