The distibution of Elatine hydropiper L. (Elatinaceae)

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Electrocardiography and cardiac magnetic resonance imaging in the detection of left ventricular hypertrophy : the impact of indexing methods

Background: Discrepancies between increased left ventricular mass (LVM) and electrocardiographic (ECG) criteria for the diagnosis of left ventricular hypertrophy (LVH) are described in the literature. Aims: This study aimed to evaluate the usefulness of ECG criteria in the diagnosis of LVH, as determined by cardiac magnetic resonance (CMR) imaging, using various LVM indexing methods. Methods: We included 53 patients who underwent CMR imaging and had electrocardiograms of appropriate quality available in their medical records. The majority of the study patients had cardiovascular diseases. We defined CMR‑LVH as increased LVM, also assessed after LVM indexing to body surface area (LVM/BSA), height1.7, height2.7, or as the percentage of predicted LVM (%pLVM). To determine ECG‑LVH, 10 different ECG-LVH criteria were used. Results: The prevalence of CMR‑LVH ranged from 11% (for %pLVM) to 72% (for LVM/BSA). At the same time, for a single criterion, the prevalence of ECG‑LVH ranged between 1.9% (for R wave amplitude in lead V5 / V6 greater than 2.6 mV, Sokolow–Lyon product, and Gubner–Ungerleider criterion) and 45.3% (for Peguero–Lo Presti criterion), showing high sensitivity, from 55.3% (95% CI, 38.3–71.4) to 100% (95% CI, 54.1–100). The sensitivity of ECG‑LVH criteria when all criteria were applied together ranged from 57.9% (95% CI, 40.8–73.7) to 100% (95% CI, 63.1–100). The best performance regarding the endpoint of CMR‑LVH diagnosis after LVM indexing was achieved by the Peguero–Lo Presti and Cornell criteria (area under the curve, 0.621–0.876; P, 0.001–0.17). Conclusions: Thediagnosis of LVH strongly depends on ECG- and CMR‑based definitions. ThePeguero–Lo Presti criterion and the Cornell criteria, which are sex‑specific, may provide the highest level of diagnostic accuracy and should be considered when screening patients with cardiovascular diseases for LVH

Recent distribution of the Euro-Siberian-sub-Mediterranean species Elatine alsinastrum L. (Elatinaceae)

The general distribution of the endangered Euro-Siberian sub-Mediterranean species Elatine alsinastrum L. is provided using literature, web-sources and herbaria dataset. The distribution pattern shows some regularities: occurrence of locations along river valleys, formation of concentrated site clusters in some lowlands, wide distances between locations or site clusters or single locations between their clusters. The distribution patterns in central Europe seem to be rather well related to the history of the human migration in Europe at least since the Late Holocene. The scattered locations on the eastern part of the distribution area are likely to be a consequence of missing information, rather than to the fragmentation of its distribution

Chromosome numbers of selected species of Elatine L. (Elatinaceae)

The paper reports chromosome numbers for 13 taxa of Elatine L., including all 11 species occurring in Europe, namely E. alsinastrum, E. ambigua, E. brachysperma, E. brochonii, E. californica, E. campylosperma, E. gussonei, E. hexandra, E. hungarica, E. hydropiper, E. macropoda, E. orthosperma, E. triandra originating from 17, field-collected populations. For seven of them (E. ambigua, E. californica, E. campylosperma, E. brachysperma, E. brochonii, E. hungarica, E. orthosperma) the chromosome numbers are reported for the first time. With these records, chromosome numbers for the whole section Elatinella Seub. became available. Although 2n = 36 was reported to be the most common and the lowest chromosome number in the genus, our data show that out of thirteen species analyzed, six had 36 chromosomes but five species had 54 chromosomes, and the lowest number of chromosomes was 18. These data further corroborates that the basic chromosome number in Elatine is x = 9

Chromosome numbers of selected species of Elatine L. (Elatinaceae)

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Data on species plasticity and stable characters has an overall importance in identification keys: comments on Brullo et al. (2022) article

The paper of Brullo et al. (2022) aimed to lectotypify _Elatine macropoda_ Guss. and _E. gussonei_ (Sommier) Brullo et al., two enigmatic members of the genus. They gave an overview of the taxonomic issue of these species, identified the type specimens, and gave a comprehensive description of both species, as well as aimed to clarify open questions in the nomenclature of these taxa. However, some of the points raised by Brullo et al. (2022) are in contrast to previously published scientific evidence, leading them to reach different taxonomic conclusions. This contrast is the result of (i) misinterpreted some key findings published in other works, and (ii) stitching to preconceptions on the distribution and specific characteristics of these species. Given the importance of scientific discussion, authors here attempt to shed light on contested points to help the better understanding of the taxonomy of this genus in Europe

The distribution of Elatine hexandra (Lapierre) DC. (Elatinaceae)

General distribution map of Elatine hexandra (Lapierre) DC. was made based on literature and web-based data confronted and possible reasons of the formation of taxon's distribution range and history are discussed