Complex Rhythms Research Articles

Cardiac Dynamics in Auditory-Motor Synchronization: Roles of Short-Term Training and Rhythm Complexity

ABSTRACT Previous findings suggest that long-term musical training and rhythm complexity may affect performers’ auditory-motor synchrony and their cardiac rhythms. We investigated the effects of short-term training and rhythm complexity on auditory-motor synchronization and cardiac activity as individuals synchronized with auditory rhythms. Forty-two adult participants synchronized their taps with sounded rhythms to form a 2:3 duration ratio (stimulus duration:tap duration) or a 3:2 duration ratio (tap rate held constant across rhythms). Participants received short training with one rhythm and received longer training with the other rhythm. Then, participants completed five experimental trials in which they synchronized their sounded taps with the stimulus rhythm. Cardiac activity was recorded during synchronization. Tapping synchronization was less accurate and more variable for the 3:2 rhythm than the 2:3 rhythm. Linear measures of cardiac activity showed less high-frequency variability during the 3:2 rhythm than the 2:3 rhythm. Behavioral-cardiac correspondences emerged with training: Poorer synchronization was associated with more variable cardiac activity after long training, but not after short training. Finally, there were consistent individual differences in cardiac recurrence and predictability across training conditions. These findings demonstrate both short-term learning effects and rhythm complexity effects on cardiac dynamics during auditory-motor synchronization.

Trends of modern Ukrainian jazz music in Germany in the XXI century (on the example of Tamara Lukasheva’s creativity)

Statement of the problem. European jazz art of the 21st century continues to develop the trends that were formed in world jazz in the last third of the 20th century. Among them is the interaction with musical ideas of folklore of various peoples of the world, as well as rock music. As a result of this process, such phenomena as ethno-jazz, fusion, and funk and there experimental types were formed, which is found a wide distribution in the territory of Ukraine and provided many opportunities for the disclosure and popularization of the national musical culture. Scientific interest is seen in the study of trends in its development not only within the country, but also abroad, in particular in Germany, where Ukrainian jazz musicians come to. In modern jazzology, the topic of the Jazz and Ukrainian folklore interaction has been studied to some extent, as well as the theme of interaction between jazz and academic music. Some features of the activities of Ukrainian jazzmen in Ukraine and abroad, including T. Lukasheva, are revealed in interviews with musicians, popular science articles, as well as reviews of albums or concerts. Objectives, methods, and novelty of the research. The purpose of the article is to reveal the genre-stylistic specificity of T. Lukasheva’s work in the context of Ukrainian jazz music making in Germany in the 21st century. A set of scientific methods, such as historical-genetic, comparative, interpretive and analytical, contributed to the disclosing the theme of the article. The novelty of the research topic is connected with almost complete lack of its researching in the national jazz studies. Research results and conclusion. T. Lukasheva’s work is in line with the trends that emerged in Ukrainian jazz at the turn of the twentieth and twenty-first centuries: ethno-jazz, funk, fusion in there experimental forms. The individualization of her author’s style took place in Germany, where she revealed herself not only as a virtuoso vocalist and pianist, but also as a talented composer and arranger. This was manifested in the compositions that were performed in the concerts at the Stadtgarten and were considered in the study. They confirm the opinion that the artist masterfully owns her voice, demonstrates a variety of vocal techniques, embodies a wide variety of artistic images. The musician has a wide vocal range of three octaves, non-standard harmonic thinking and a sense of musical time, which allows her to freely feel herself in improvisational solos and in other sections of the form where complex meter and rhythm meet. It is indisputable that one of the leading driving forces in jazz is a creative personality, who must have leadership qualities, bright charisma, musical intelligence, and attract like-minded musicians. All these qualities are fully characteristic of Tamara Lukasheva.

The Crisis of the Present Moment and the Crisis of Contemporary Theory

Instead of crisis as a punctual event the contemporary experience is one of overlapping forms and modes of crisis resulting in a complex rhythm. While attempting to respond to this situation contemporary theory has often struggled to focus on the present moment of crisis. Instead, it has turned to a fundamental rift in the past or to the need to invent a utopian future as ways of escaping the present crisis. This is due to the influence of Heidegger and, especially, Nietzsche. The result is a tendency to abandon the present as destitute and to treat the current situation as an epochal crisis of civilization, which can only be resolved through subjective will. In contrast, the work of Mario Tronti is used to grasp the rhythm of crisis as one of scattered struggles that disperse knowledge and understanding. The result is a crisis in understanding, particularly a crisis of historical sense and the capacity to grasp a temporality that connects past, present, and future. While contemporary theory risks mythic or even imaginary solutions to the rhythm of crisis, instead we must pursue the critical potentials of the present grasped as connected to the past and future.

Transnational Temporalities: Capitalism, Crisis, Social Movements

The article reconsiders contemporary internationalist experiences in relation to the multiple temporalities that characterized key cycles of struggles in the 2010s. Although these cycles are heterogeneous in social and political composition, they have resulted in significant synchronizations. The article's specificity lies in linking a reinterpretation of internationalism to an examination of the role that multitemporalities play both in longue durée capital development and in the various phases that characterized the post-2008 world. The series of crises that have marked the past decade have in fact led to contradictory outcomes, on the one hand opening the door to the rise of post-fascist forces, while on the other hand triggering unusual and powerful struggles. These outcomes have contradictory political orientations but are united by the fact they all have temporalities that are discordant with those initially imposed by capitalist processes. With regard to social movements, the article shows how the diversity of the geographies, practices, and claims animating them can be understood as unfolding “within and against” the post-2008 global scenario. It illustrates how contemporary social movements exhibit complex and contradictory rhythms and temporalities, arguing that the tuning between these multitemporalities is vital for rethinking the renewal of internationalism today.

Oscillatory attention in groove

Attention is not constant but rather fluctuates over time and these attentional fluctuations may prioritize the processing of certain events over others. In music listening, the pleasurable urge to move to music (termed ‘groove’ by music psychologists) offers a particularly convenient case study of oscillatory attention because it engenders synchronous and oscillatory movements which also vary predictably with stimulus complexity. In this study, we simultaneously recorded pupillometry and scalp electroencephalography (EEG) from participants while they listened to drumbeats of varying complexity that they rated in terms of groove afterwards. Using the intertrial phase coherence of the beat frequency, we found that while subjects were listening, their pupil activity became entrained to the beat of the drumbeats and this entrained attention persisted in the EEG even as subjects imagined the drumbeats continuing through subsequent silent periods. This entrainment in both the pupillometry and EEG worsened with increasing rhythmic complexity, indicating poorer sensory precision as the beat became more obscured. Additionally, sustained pupil dilations revealed the expected, inverted U-shaped relationship between rhythmic complexity and groove ratings. Taken together, this work bridges oscillatory attention to rhythmic complexity in relation to musical groove.

Inner sense of rhythm: percussionist brain activity during rhythmic encoding and synchronization.

The main objective of this research is to explore the core cognitive mechanisms utilized by exceptionally skilled percussionists as they navigate complex rhythms. Our specific focus is on understanding the dynamic interactions among brain regions, respectively, related to externally directed cognition (EDC), internally directed cognition (IDC), and rhythm processing, defined as the neural correlates of rhythm processing (NCRP). The research involved 26 participants each in the percussionist group (PG) and control group (CG), who underwent task-functional magnetic resonance imaging (fMRI) sessions focusing on rhythm encoding and synchronization. Comparative analyses were performed between the two groups under each of these conditions. Rhythmic encoding showed decreased activity in EDC areas, specifically in the right calcarine cortex, left middle occipital gyrus, right fusiform gyrus, and left inferior parietal lobule, along with reduced NCRP activity in the left dorsal premotor, right sensorimotor cortex, and left superior parietal lobule. During rhythmic synchronization, there was increased activity in IDC areas, particularly in the default mode network, and in NCRP areas including the left inferior frontal gyrus and bilateral putamen. Conversely, EDC areas like the right dorsolateral prefrontal gyrus, right superior temporal gyrus, right middle occipital gyrus, and bilateral inferior parietal lobule showed decreased activity, as did NCRP areas including the bilateral dorsal premotor cortex, bilateral ventral insula, bilateral inferior frontal gyrus, and left superior parietal lobule. PG's rhythm encoding is characterized by reduced cognitive effort compared to CG, as evidenced by decreased activity in brain regions associated with EDC and the NCRP. Rhythmic synchronization reveals up-regulated IDC, down-regulated EDC involvement, and dynamic interplay among regions with the NCRP, suggesting that PG engages in both automatic and spontaneous processing simultaneously. These findings provide valuable insights into expert performance and present opportunities for improving music education.

Complexity of STG signals and linguistic rhythm: a methodological study for EEG data.

The superior temporal and the Heschl's gyri of the human brain play a fundamental role in speech processing. Neurons synchronize their activity to the amplitude envelope of the speech signal to extract acoustic and linguistic features, a process known as neural tracking/entrainment. Electroencephalography has been extensively used in language-related research due to its high temporal resolution and reduced cost, but it does not allow for a precise source localization. Motivated by the lack of a unified methodology for the interpretation of source reconstructed signals, we propose a method based on modularity and signal complexity. The procedure was tested on data from an experiment in which we investigated the impact of native language on tracking to linguistic rhythms in two groups: English natives and Spanish natives. In the experiment, we found no effect of native language but an effect of language rhythm. Here, we compare source projected signals in the auditory areas of both hemispheres for the different conditions using nonparametric permutation tests, modularity, and a dynamical complexity measure. We found increasing values of complexity for decreased regularity in the stimuli, giving us the possibility to conclude that languages with less complex rhythms are easier to track by the auditory cortex.

Classification of Classical Indian Music Tabla Taals using Deep Learning

In the research that we are bringing to light, we profoundly explore the categorization of Classical Indian Music Tabla Taals. This emphasizes widely recognized taals such as Addhatrital, Ektal, Rupak, Dadra, Deepchandi, Jhaptal, Trital, and Bhajani. To push the boundaries of our understanding, we implement a mixed-methods approach tethering both Feedforward Neural Networks (FNN) and Convolutional Neural Networks (CNN). These state-of-the-art technologies enable us to dissect and categorize tabla taals efficiently. In essence, the hallmark of Classical Indian music is its complex and multifaceted rhythms brought to life by the primal percussive instrument - the tabla. The conception and reproduction of these nuanced taals require technical finesse. Thus, accompanying the digital revolution and the eclectic musical preferences, it becomes essential for advanced methodologies to pinpoint and classify tabla taals. The hardcover of our research opens up to the magnificent crafting of an unmatched model employing both FNN and CNN. This blend enables us to recognize diverse features unique to tabla taals like Addhatrital, Ektal, Rupak, Dadra, Deepchandi, Jhaptal, Trital, and Bhajani. The model obtained its bosom knowledge during training from an assortment of Classical Indian music recordings showcasing these invigorating taals. This fosters a broader understanding regarding the array of minute differences brimming within each rhythmic inheritance. To bring user interaction to life, we have embedded a Graphical User Interface (GUI). This empowers users to introduce an audio file filled with table music from the taals listed and receive on-the-spot recognition. refining their connection and knowledge of the taal in question. Our research findings procure paramount importance in the scape of music analysis, especially framed within the heart of Classical Indian Music. We propose a system that would serve as a tool for amateur table players to learn the skill well and master their art. Instructors could also utilize it for training purposes. It opens a new window of possibilities providing an advanced model for intuitive, swift, and accurate automated identification of tabla taals.

What could the Railway teach us about Progress?

Propelled by steel, charcoal and steam the railway once carried the story of progress and the rise of the developed modern society. While the orient express nurtured a vivid, mythical aura during more than a hundred years, it seems like future stories about the railway mainly gravitate around hyperloops and increased speed. How come the narratives around railways have become so futile? How come imaginaries about progress have got stuck? With the help of critical imagination and the method of design fiction, this article will set out on an imaginary journey to re-storying the future railway and discuss how this could help us rethink progress. Alternative paths will be explored that allow room for stories depicting train rides in slower paces and complex rhythms and materials, a rich melting pot for diverse and vivid sub-cultures, bottom up grassroot services, experimental sharing cultures, touring theater companies, maker movements, and new citizen-driven cooperatives.

THE ASSOCIATION OF A NOVEL PHYSICAL ACTIVITY METRIC WITH COGNITION AND RISK OF DEMENTIA

Abstract Physical activity (PA) is associated with cognitive function and Alzheimer’s disease and related dementias (ADRD). Although associations between continuously measured PA and ADRD have been assessed, multiscale entropy (MSE), which quantifies dynamics of physiological systems over multiple time scales, has not been used to quantify daily activity rhythms in older adults by cognitive status. We examined the association of this novel metric of PA complexity with cognitive function, mild cognitive impairment (MCI), and dementia in participants of the Baltimore Longitudinal Study of Aging. A total of 615 older adults (mean age=73.9±11.3 years, 54.5% women) completed a 7-day wrist-worn accelerometer assessment between 2015-2019. Global cognitive function was measured using the Mini-Mental State Examination (MMSE). Mild cognitive impairment (MCI) or dementia was diagnosed based on Petersen criteria and Diagnostic and Statistical Manual of Mental Disorders, respectively. Unadjusted logistic regression models showed that participants in the lowest tertile of complexity had 2.31 times the odds of low MMSE score (≤26) compared to those in the highest tertile (odds ratio [OR]=2.31, 95% confidence interval [CI]=1.09-4.89). This association lost significance after adjusting for age, sex, race, and education years. The lowest tertile of complexity was also associated with 2.58 times the odds of MCI/dementia diagnosis, adjusting for demographics (OR=2.58, 95% CI=1.06-6.31). These results suggest that lower complexity of accelerometry-detected movement is associated with poorer cognitive function and greater risk of MCI/dementia. Future longitudinal studies are warranted to examine whether altered complexity of daily activity rhythms may act as a preclinical indicator of ADRD.

Heart rhythm complexity analysis in patients with inferior ST-elevation myocardial infarction

Heart rhythm complexity (HRC), a subtype of heart rate variability (HRV), is an important tool to investigate cardiovascular disease. In this study, we aimed to analyze serial changes in HRV and HRC metrics in patients with inferior ST-elevation myocardial infarction (STEMI) within 1 year postinfarct and explore the association between HRC and postinfarct left ventricular (LV) systolic impairment. We prospectively enrolled 33 inferior STEMI patients and 74 control subjects and analyzed traditional linear HRV and HRC metrics in both groups, including detrended fluctuation analysis (DFA) and multiscale entropy (MSE). We also analyzed follow-up postinfarct echocardiography for 1 year. The STEMI group had significantly lower standard deviation of RR interval (SDNN), and DFAα2 within 7 days postinfarct (acute stage) comparing to control subjects. LF power was consistently higher in STEMI group during follow up. The MSE scale 5 was higher at acute stage comparing to control subjects and had a trend of decrease during 1-year postinfarct. The MSE area under scale 1–5 showed persistently lower than control subjects and progressively decreased during 1-year postinfarct. To predict long-term postinfarct LV systolic impairment, the slope between MSE scale 1 to 5 (slope 1–5) had the best predictive value. MSE slope 1–5 also increased the predictive ability of the linear HRV metrics in both the net reclassification index and integrated discrimination index models. In conclusion, HRC and LV contractility decreased 1 year postinfarct in inferior STEMI patients, and MSE slope 1–5 was a good predictor of postinfarct LV systolic impairment.

Auditory rhythm complexity affects cardiac dynamics in perception and synchronization

Accurate perception and production of auditory rhythms are key for human behaviors such as speech and music. Auditory rhythms in music range in their complexity: complex rhythms (based on non-integer ratios between successive tone durations) are more difficult to perceive and produce than simple rhythms (based on integer ratios). The physiological activity supporting this behavioral difference is not well understood. In a within-subjects design, we addressed how rhythm complexity affects cardiac dynamics during auditory perception and production. Musically trained adults listened to and synchronized with simple and complex auditory rhythms while their cardiac activity was recorded. Participants identified missing tones in the rhythms during the Perception condition and tapped on a keyboard to synchronize with the rhythms in the Synchronization condition. Participants were equally accurate at identifying missing tones in simple and complex rhythms during the Perception condition. Tapping synchronization was less accurate and less precise with complex rhythms than with simple rhythms. Linear cardiac analyses showed a slower mean heart rate and greater heart rate variability during perception than synchronization for both simple and complex rhythms; only nonlinear recurrence quantification analyses reflected cardiac differences between simple and complex auditory rhythms. Nonlinear cardiac dynamics were also more deterministic (predictable) during rhythm perception than synchronization. Individual differences during tapping showed that greater heart rate variability was correlated with poorer synchronization. Overall, these findings suggest that linear measures of musicians’ cardiac activity reflect global task variability while nonlinear measures additionally reflect stimulus rhythm complexity.

Abstract 18178: Should We Screen for S-ICD Vectors in Hypertrophic Cardiomyopathy Post-Myectomy?

Case Description: We describe a 40 year old Asian male with hypertrophic cardiomyopathy (HCM) who presented after an inappropriate shock from his subcutaneous ICD (S-ICD) but was otherwise asymptomatic. The device was placed 4 months ago for secondary prevention of sudden cardiac death (SCD). He underwent a septal myectomy 2 months prior to presentation for severe LVOT obstruction. EKG showed sinus rhythm with new post-myectomy LBBB. Troponins were normal. Device interrogation revealed a wide complex rhythm consistent with sinus tachycardia with LBBB and evidence of T-wave oversensing (TWOS). The S-ICD was turned off and no further arrythmias were seen on continuous telemetry. Subsequent vector rescreening reflected ineligibility for S-ICD, most likely due to altered QRS morphology post-myectomy. Accordingly, the S-ICD system was extracted and a dual chamber transvenous ICD was placed. Patient noted to be doing well at 3 months follow up. Discussion: S-ICD is a safe and effective alternate to transvenous ICDs to prevent SCD in patients with HCM, especially those with a long life-expectancy. The pre-implant automated screening tool generates 3 sensing vectors. Screening is done to ensure at least 1 vector with suitable EKG morphology as low amplitude vectors and low R:T ratios increase risk of oversensing. However, post-surgical changes can alter the QRS morphology as seen above. This can significantly impact the screening process. Currently, there are no guidelines for rescreening. We propose rescreening in the setting of significant QRS changes (especially post-operatively) to reduce the risk of oversensing and undersensing in high risk populations.

Rhythmic Complexity of Graduate Students’ Written Assignments: An Analysis of Their Thematic Choices

The majority of the work on academic writing has focused on methods to analyse students' views of and attitudes towards writing. However, research on students' perceptions of the impact of their choices on the clarity and quality of their texts remains scant. This study used a content analysis approach to analyse graduate students’ written assignments across academic genres to understand their thematic choices, and the choices’ rhythmic effects and communicative functions. Further, it employed a grounded theory approach to examine students’ perception of the effect of their thematic choices on their assignments’ rhythmic complexity. Inspired by Martin and Rose’s (2007) semantic approach to Systematic Functional Linguistics, the study analysed 108 written assignments and conducted semi-structured interviews with 18 students. According to the findings, the assignments commonly included topical and unmarked themes, and students used different types of themes to control the rhythmic complexity and structure of the texts. Additionally, students used different thematic structures to achieve different communicative objectives, which in turn motivated them to use complex thematic patterns. Finally, students' perceptions were affected by their writing proficiency, academic and genre knowledge, linguistic background, stylistic preferences, and learning experiences.

The effects of rhythmic structure on tapping accuracy

Prior investigations of simple rhythms in familiar time signatures have shown the importance of several mechanisms; notably, those related to metricization and grouping. But there has been limited study of complex rhythms, including those in unfamiliar time signatures, such as are found outside mainstream Western music. Here, we investigate how the structures of 91 rhythms with nonisochronous onsets (mostly complex, several in unfamiliar time signatures) influence the accuracy, velocity, and timing of taps made by participants attempting to synchronize with these onsets. The onsets were piano-tone cues sounded at a well-formed subset of isochronous cymbal pulses; the latter occurring every 234 ms. We modelled tapping at both the rhythm level and the pulse level; the latter provides insight into how rhythmic structure makes some cues easier to tap and why incorrect (uncued) taps may occur. In our models, we use a wide variety of quantifications of rhythmic features, several of which are novel and many of which are indicative of underlying mechanisms, strategies, or heuristics. The results show that, for these tricky rhythms, taps are disrupted by unfamiliar period lengths and are guided by crude encodings of each rhythm: the density of rhythmic cues, their circular mean and variance, and recognizing common small patterns and the approximate positions of groups of cues. These lossy encodings are often counterproductive for discriminating between cued and uncued pulses and are quite different to mechanisms—such as metricization and emphasizing group boundaries—thought to guide tapping behaviours in learned and familiar rhythms.

Macaque monkeys and humans sample temporal regularities in the acoustic environment.

Many animal species show comparable abilities to detect basic rhythms and produce rhythmic behavior. Yet, the capacities to process complex rhythms and synchronize rhythmic behavior appear to be species-specific: vocal learning animals can, but some primates might not. This discrepancy is of high interest as there is a putative link between rhythm processing and the development of sophisticated sensorimotor behavior in humans. Do our closest ancestors show comparable endogenous dispositions to sample the acoustic environment in the absence of task instructions and training? We recorded EEG from macaque monkeys and humans while they passively listened to isochronous equitone sequences. Individual- and trial-level analyses showed that macaque monkeys' and humans' delta-band neural oscillations encoded and tracked the timing of auditory events. Further, mu- (8-15Hz) and beta-band (12-20Hz) oscillations revealed the superimposition of varied accentuation patterns on a subset of trials. These observations suggest convergence in the encoding and dynamic attending of temporal regularities in the acoustic environment, bridging a gap in the phylogenesis of rhythm cognition.

Dopamine dysregulation in Parkinson's disease flattens the pleasurable urge to move to musical rhythms.

The pleasurable urge to move to music (PLUMM) activates motor and reward areas of the brain and is thought to be driven by predictive processes. Dopamine in motor and limbic networks is implicated in beat-based timing and music-induced pleasure, suggesting a central role of basal ganglia (BG) dopaminergic systems in PLUMM. This study tested this hypothesis by comparing PLUMM in participants with Parkinson's disease (PD), age-matched controls,and young controls. Participants listened to musical sequences with varying rhythmic and harmonic complexity (low, medium and high), and rated their experienced pleasure and urge to move to the rhythm. In line with previous results, healthy younger participants showed an inverted U-shaped relationship between rhythmic complexity and ratings, with preference for medium complexity rhythms, while age-matched controls showed a similar, but weaker, inverted U-shaped response. Conversely, PD showed a significantly flattened response for both the urge to move and pleasure. Crucially, this flattened response could not be attributed to differences in rhythm discrimination and did not reflect an overall decrease in ratings. For harmonic complexity, PD showed a negative linear pattern for both the urge to move and pleasure while healthy age-matched controls showed the same pattern for pleasure and an inverted U for the urge to move. This contrasts with the pattern observed in young healthy controls in previous studies, suggesting that both healthy aging and PD also influence affective responses to harmonic complexity. Together, these results support the role of dopamine within cortico-striatal circuits in the predictive processes that form the link between the perceptual processing of rhythmic patterns and the affective and motor responses to rhythmic music.

The Pleasurable Urge to Move to Music Through the Lens of Learning Progress.

Interacting with music is a uniquely pleasurable activity that is ubiquitous across human cultures. Current theories suggest that a prominent driver of musical pleasure responses is the violation and confirmation of temporal predictions. For example, the pleasurable urge to move to music (PLUMM), which is associated with the broader concept of groove, is higher for moderately complex rhythms compared to simple and complex rhythms. This inverted U-shaped relation between PLUMM and rhythmic complexity is thought to result from a balance between predictability and uncertainty. That is, moderately complex rhythms lead to strongly weighted prediction errors which elicit an urge to move to reinforce the predictive model (i.e., the meter). However, the details of these processes and how they bring about positive affective responses are currently underspecified. We propose that the intrinsic motivation for learning progress drives PLUMM and informs the music humans choose to listen to, dance to, and create. Here, learning progress reflects the rate of prediction error minimization over time. Accordingly, reducible prediction errors signal the potential for learning progress, producing a pleasurable, curious state characterized by the mobilization of attentional and memory resources. We discuss this hypothesis in the context of current psychological and neuroscientific research on musical pleasure and PLUMM. We propose a theoretical neuroscientific model focusing on the roles of dopamine and norepinephrine within a feedback loop linking prediction-based learning, curiosity, and memory. This perspective provides testable predictions that will motivate future research to further illuminate the fundamental relation between predictions, movement, and reward.

Features of the course of acute coronary syndrome in medical workers who have undergone a new coronavirus infection

Both in Russia and worldwide, morbidity and mortality from acute coronary syndrome (ACS) remain high. The emergence of a new coronavirus infection, the active participation of medical workers in its elimination, determined a new phenotype of patients, which determines the relevance of the problem and of a more detailed assessment of this cohort of patients. Aim of the study was to identify and determine the clinical and functional features, phenotype and endotype of the course of ACS in medical workers who have had a new coronavirus infection. Material and methods. An open cohort comparative study was conducted. It included 60 healthcare workers with ACS and a previous novel coronavirus infection, who were selected based on the identification of SARS-CoV-2 and/or its antibodies (positive PCR test) in anamnesis. All patients were admitted to the regional vascular center № 7 of the City Clinical Hospital № 2, Novosibirsk. The comparison group consisted of 60 healthcare workers with ACS without positive PCR test in anamnesis. General clinical and instrumental, coronary angiography with possible stenting. Results. Of the 60 medical workers with ACS after a new coronavirus infection, myocardial infarction with ST segment elevation was detected in 21 people, myocardial infarction without ST segment elevation – in 31, unstable angina pectoris – in 8 people. Within 6 months of undergoing COVID-19, they developed complex rhythm disorders, such as paroxysm of fibrillation or atrial flutter, more frequently than in the comparison group, as well as a full AV-blockade (n = 25, 41.6 %, p = 0.020), bradyarrhythmias and conductivity disturbances (n = 8, 13.3 %, p = 0.045), revealed a more than 2-fold increase in the pro-brain natriuretic peptide (proBNP) (n = 21, 35 %, p = 0.033), observed myocardial dysfunction (ejection fraction less than 50 %) (n = 6, 10 %, p = 041). Conclusions. The data obtained indicate the formation of a new ACS phenotype in medical workers who have undergone a new coronavirus infection.

A complex rhythm for a complex congenital heart disease.

A complex rhythm for a complex congenital heart disease.