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Biomedical subjects

K Amano

Publications and source records attributed to K Amano.

At least 433 records · Page 24Linked to original sources
PubMed1976

Genesis of the third heart sound. Phonoechocardiographic studies.

To clarify the genesis of the third heart sound (IIIS), phonoechocardiographic analysis was made in 31 cases with apparent IIIS. The mitral valve, either anterior or posterior, showed no definite movement coincided with the IIIS. At the time of IIIS, mitral valve is in the closing process, but it is still widely open, and there was no evidence of the stretch or tension of the valve apparatus. On the other hand, the endocardial echoes, either of interventricular septum or of posterior wall of the left ventricle, almost always showed definite check point (point of inflexion) during (or exactly at the end of) rapid ventricular filling as manifested by the sudden change in the diastolic dimension of the left ventricle near the apex. The IIIS seems likely to originate from the abruptly arrested momentum of the moving mass of blood at this check point and then the vibration of the relaxed cardiohemic system.

Adult↗
PubMed1976

[Dimer-X ventriculography (author's transl)].

After the first report on ventriculography with a water-soluble contrast medium, Conray, by Campbell et al., many authors reported complications such as convulsion which are attributable to the irritating effect of this agent. On the other hand its value has been appriciated. Recently Gonsette recommended a new water-soluble contrast medium, meglumine iocarnate (Dimer-X), for ventriculography and reported that this new agent is less epileptogenic and less harmful. Because of these advantages, they have been performing ventriculography routinely with Dimer-X and recognized its usefulness. The only noticeable complication has been the transient elevation of body temperature in almost a half of the series. As far as our experience goes there is no case of convulsive seizure as complication. As compared to gas ventriculography, the fine details of dimension and configuration of the ventricles are far more beautifully delineated with the water-soluble contrast media.

Adult↗
PubMed1975

[Disease course and outcome in hospitalized patients over 60-years old].

The authors have examined all of the hospitalized patients who were over sixty years old in all psychiatric clinics in Gifu Prefecture, Japan, on December 31, 1968, and many of them were reexamined on June 30, 1973. Through these both serial examinations, the following results are obtained: 1) Of the total 187 patients who underwent the first examination, 62 patients were still hospitalized and subjected to the second examination. 2) Twenty nine of the 62 patients were schizophrenics. One fourth of them were in remission, the rest being in a desolate or paraphrenic condition. Thirty six schizophrenics have discharged hospitals: 12 patients have left off hospitals getting a considerable improvement and 15 patients were dead. 3) Of the thirteen manic-depressives, only three were still hospitalized, and two of them were in remission. There were 10 discharged cases: three cases dead and six cases improved. 4) Six of the 24 patients diagnosed as senile dementia were still hospitalized. The diagnosis of two cases has been changed into paranoid reaction and depression respectively. Of 18 discharged patients, 14 cases were dead and the remaining four were improved. 5) Of the 22 patients diagnosed as senile psychosis, only two patients were still hospitalized, and the diagnosis has been changed into schizophrenia and epilepsy respectively. The 20 patients have left hospitals: nine cases dead and another nine improved. As the beginning symptoms, these patients showed paranoid-hallucinatic aspects which were similar to those of schizophrenia. In some cases, certain incidents that had preceded onset of the illness were found. 6) Most of the aged patients with the diagnoses associated with the physical conditions due to aging were dead.

Aged↗