In Groningen there has been a continuous investigation of hypertrophic cardio myopathy for almost twenty years. Members of this working-group have tried to study the many aspects of this intriguing disease, and it is in this volume that they present their recent results and current concepts (chapters 2, 3, 5 and 6). A contribution from the Dutch interuniversity Institute of Cardiology presenting a detailed account of evaluation by means of radionuclide techniques completes the non-invasive picture of cardiomyopathies (chapter 4). On July 6th, 1984, a symposium entitled 'Recent views on...