With the recent improvement in survival rate of thoracic malignancies with chemo-radiation therapy, radiation-induced heart disease (RIHD) has come to be recognized. Radiation-induced cardiomyopathy (RICM) is one of the manifestations of RIHD, which presents with left ventricular (LV) systolic or diastolic dysfunction due to myocardial fibrosis. We experienced medically refractory heart failure (HF) due to severely reduced LV systolic function suggesting RICM, and T1 mapping by cardiac magnetic resonance (CMR) image was useful to depict myocardial properties. Case presentation A 70-year-old man was admitted to Tottori University Hospital due to exertional dyspnea and bilateral leg edema.

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The rotational instability of a field-reversed configuration (FRC) can be suppressed by applying a multipole magnetic field. The multipole field, however, breaks the axisymmetry and may compromise configuration. An alternative method using injected ‘‘beam’’ ions would preserve the symmetry. This method is studied here within the framework of a multifluid model for which a variational principle has been developed and solved using the Rayleigh–Ritz technique. This approach leads to an analytic solution for a rigid-rotor equilibrium and allows the straightforward derivation of marginal stability conditions. This was not possible with a previous hybrid simulation which, though more complete, was cumbersome to apply. It is found that if the ratio of the rotational frequency of beam ions to that of the background ions exceeds a critical value, the radial displacement of the plasma and beam ions are opposite, and the rotational instability can be suppressed. The effect of compressibility of beam ions on the stability is also examined. The stability analysis is applied to present or near-term experimental devices and a future reactor. The beam energy and current need only be a small fraction of those of the background plasma in order to stabilize the rotational instability. These results are in qualitative agreement with previous results from a hybrid particle simulation.

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Right ventricular outflow tract obstruction was suspected in a 32-year-old man with repaired tetralogy of Fallot and borderline indications for surgical. Right heart catheterisation with a dobutamine stress test was useful in assessing the dynamics and severity of right ventricular outflow tract obstruction and in determining the treatment strategy.