505 cases of Ebstein's anomaly have been collected from 6i centres in 28 countries: 258 were male and 247 were female. Thirty-five (infants) were less than I year old, 403 (children and adolescents) were between i and 25years old, and 67 (adults) were over 25years old. Of the infants, 72 per cent were in heart failure, but in 8I per cent of the others growth and development during infancy was said to have been average or good. Of the children and adolescents, 7I per cent, and of the adults, 6o per cent, had little or no disability and were classified as cardiac grade I or IL Catheterizations were carried out on 363patients, with I3 deaths and 6 cardiac arrests: paroxysmal tachycardia occurred during the procedure in 9o of them. Necropsy was carried out in 93 cases: 48 per cent of those catheterized and 8i per cent of those coming to necropsy had associated congenital cardiac malformations. If defects in the interatrial septum are excluded the figures are I2 per cent and 42 per cent, respectively. The presence of an additional lesion appeared to increase the risk in those having surgical treatment.Of the series, IO per cent had ventricular pre-excitation and 28 per cent gave a history of paroxysmal dysrhythmia. Their presence was predictive for neither death nor dysrhythmia during cardiac catheterization, nor for sudden natural death.Of the 505, 77 (I3'3%) diedfrom natural causes, and 3I (54.4%) of the 57 who had surgical treatment did not survive operation. Analysis of the surgical experience suggests that palliative procedures have little or nothing to offer and that replacement of the malformed tricuspid valve should be delayed, ifpossible, until the patient's heart is large enough to take an adult-size prosthesis or homograft.on July 15, 2020 by guest. Protected by copyright.

Agrivoltaics describes concurrent agricultural production of crops and photovoltaic generation of electricity on the same cropland. By using tinted semi‐transparent solar panels, this study introduces a novel element to transform the concept of agrivoltaics from just solar‐sharing to selective utilization of different light wavelengths. Agrivoltaic growth of basil and spinach is tested. When compared with classical agriculture, and based on the feed‐in‐tariff of the experimental location, agrivoltaic co‐generation of biomass and electricity is calculated to result in an estimated financial gross gain up to +2.5% for basil and +35% for spinach. Marketable biomass yields do not change significantly for basil, while a statistically significant loss is observed for spinach. This is accompanied by a relative increase in the protein content for both plants grown under agrivoltaic conditions. Agrivoltaics implemented with tinted solar panels improve the biomass production per unit amount of solar radiation up to 68%, with up to 63% increase in the ratio of leaf and stem biomass to root. Agrivoltaics can enrich the portfolio of farmers, mitigate risks associated with climate, and vastly enhance global photovoltaics capacity without compromising agricultural production.

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The history of intracardiac electrography has been reviewed with particular reference to its practical application. The increasing versatility of electrode catheters is stressed and a new multipurpose diagnostic catheter with a platinum electrode is described. Electrograms chosen from 500 consecutive cases have been presented to demonstrate the use of an intracardiac lead during routine cardiac catheterization, and the special value of this technic in the investigation of congenital heart disease in babies and small children is emphasized.