Arrhythmic Pulse Research Articles

Goethe’s Lyrical Discourse in the 5th Poem of ‘Römische Elegien’

The discourse is generally meaningful, with essential potential in the field of communication as an indisputable feature of the society. Meanwhile, the lyrical discourse, as a segment of mass discourse, marks a specialized communication in poetic literary works, namely in the conversational plane between the giver and the recipient. The most specified element of this literary genre is the lyrical ‘Ich-Form’, which, among other text-building signs, is the most analyzed and discussed one of the 5th poem of Goethe’s lyrical-elegiac work, ‘Römische Elegien’.
 The study lyrical discourse in the 5th poem of Römische Elegien” presents the composition of the lyrical song in general, built and structured by the multitude of textual components and typical elements of the lyrical song. The organization of all signs in the text is laid out and arranged with precision and deep philosophy, building thus an unprecedented lexical, syntactic, semantic and stylistic unity. As a master of words, thoughts and poetic expressions in the discussed poem, Goethe has realized a source with different directions of linguistic and aesthetic flows, through which the recipient receives a lot of information marked with arrhythmic pulses. This study will be an initiative for analyzing some stylistic issues in the lyrical discourse and its elements in this well-known German poem, as issues that have not been explored yet.

PFDNet: A Pulse Feature Disentanglement Network for Atrial Fibrillation Screening From Facial Videos.

Video-based Photoplethysmography (VPPG) can identify arrhythmic pulses during atrial fibrillation (AF) from facial videos, providing a convenient and cost-effective way to screen for occult AF. However, facial motions in videos always distort VPPG pulse signals and thus lead to the false detection of AF. Photoplethysmography (PPG) pulse signals offer a possible solution to this problem due to the high quality and resemblance to VPPG pulse signals. Given this, a pulse feature disentanglement network (PFDNet) is proposed to discover the common features of VPPG and PPG pulse signals for AF detection. Taking a VPPG pulse signal and a synchronous PPG pulse signal as inputs, PFDNet is pre-trained to extract the motion-robust features that the two signals share. The pre-trained feature extractor of the VPPG pulse signal is then connected to an AF classifier, forming a VPPG-driven AF detector after joint fine-tuning. PFDNet has been tested on 1440 facial videos of 240 subjects (50% AF absence and 50% AF presence). It achieves a Cohen's Kappa value of 0.875 (95% confidence interval: 0.840-0.910, P<0.001) on the video samples with typical facial motions, which is 6.8% higher than that of the state-of-the-art method. PFDNet shows significant robustness to motion interference in the video-based AF detection task, promoting the development of opportunistic screening for AF in the community.

Arrhythmia as an Incidental Finding

Arrhythmia as an Incidental Finding Abstract. An arrhythmic pulse can be determined using clinical or technical examinations such as palpitation and ECG. Due to the rapid spread of wearables, more and more people have the opportunity to derive pulse curves or even ECGs themselves before seeking professional medical care, which increases the number of randomly detected arrhythmic pulse. Incidental findings naturally lead to relevant diagnoses in some of the people affected, but on the other hand they are also psychologically stressful for some individuals. Therefore, it is important to differentiate frequently found common benign causes from the causes with therapeutic consequence and to adequately inform patients about their rhythm. In particular bradyarrhythmias often have no therapeutic consequence as long as the patient remains asymptomatic. Pacemakers are usually only indicated for symptomatic bradycardia. Atrial fibrillation deserves special attention due to its frequency and the fact that, if undetected, this is associated with significantly increased morbidity and mortality. Supraventricular and ventricular extrasystoles increase with age. They are often "idiopathic", but they also can be an expression of still subclinical heart disease.

P727 Unexpected ventricular aneurysm: further ischemic aetiology

Abstract Introduction Ventricular aneurysm is an infrequent complication of myocardial infarction. In absence of an ischemic event, alternative aetiologies include: thoracic trauma, hypertrophic cardiomyopathy, myocarditis, Chagas disease, cardiac sarcoidosis or arrythmogenic cardiomyopathy. In the absence of any of the previous, congenital aneurysm diagnosis is made. Case We present the case of 57-year-old man referred to cardiology department because a new onset of atrial fibrillation with left bundle branch block. Past medical history included high blood pressure and dyslipidaemia without any history or smoking, alcohol consumption or any other toxic abuse. No chest pain, shortness of breath or other significant symptoms were reported. Physical examination was unremarkable except for an arrhythmic pulse at 85-90 bpm. Echocardiogram showed moderate dilated left ventricle with mild-moderate LV dysfunction (EF 40% ) with a septal aneurysm of 2.4x1cm (Picture A). A coronary CT was performed that ruled out coronary heart disease and confirmed the presence of the septal aneurysm (Picture B). To better characterize this image, a cardiac magnetic resonance (CMR) was performed. Moderate dilated LV with significant dysfunction (EF 31%) was reported. A septal aneurysm of 13 x 22 x 33 mm composed of a 2.8 m thin wall of true myocardial tissue was documented (picture C and D-late gadolinium enhance). No myocardial delayed enhancement was detected in any area of the LV. Moreover, no signs of myocardial non compaction, arrythmogenic cardiomyopathy, hypertrophic cardiomyopathy or myocarditis were seen. Chagas serology as well as sarcoidosis diagnosis work up were negative. Patient denied any thoracic traumatism. Congenital aneurysm diagnosis was finally established. Electrical cardioversion was performed after 1 month of correct oral anticoagulation and heart failure treatment was started. Case was presented in the Heart Team session and a conservative management was decided based on asymptomatic status and absence of ventricular arrhythmias. After 3 years of clinical follow up, the patients is in good status, asymptomatic and in sinus rhythm. Discussion: Congenital ventricular aneurysm is a rare cardiac malformation that arises during the fourth embryonic week. Most frequently, left ventricular aneurysms are found in the apex and the perivalvular area, being the septal location an atypical one. Most patients are asymptomatic but when symptoms occur, they are mostly related to the presence of ventricular arrhythmias. Aneurysm rupture incidence is variable, ranging from 3.7% to 12 % according to the different series. For this reason, surgery is recommended in symptomatic patients. However, management of asymptomatic patients is not clear since prognosis studies are lacking. Abstract P727 Figure. A.Echo B.-CT C.-CMR. D.-CMR gadolinium

Arterial pulsation on a human patient simulator improved students’ pulse assessment

Even with basic cardiovascular lectures, undergraduates do not usually experience the reality of palpation and, therefore, cannot integrate their physiological knowledge. We created a pulse training scenario of human patient simulators (HPS) to recognize and assess the normal and arrhythmic pulse of the radial artery. All 25 participants were recruited as volunteers to the study from the School of Allied Health Sciences, Kitasato University. Participants received training in radial palpation of arrhythmias on HPS. The test scenario included 10 arrhythmic pulses combined with normal pulses and weak pulses. The average examination scores significantly improved, from 23.8 ± 2.8 of the pretest to 72.9 ± 3.4 of the posttest (mean and SE, N = 25, p < 0.00001). A questionnaire and general written comments for the palpation training were positive. The palpation training improved the participants’ assessment of radial pulses.

Arrhythmic Pulses Detection Using Lempel-Ziv Complexity Analysis

Computerized pulse analysis based on traditional Chinese medicine (TCM) is relatively new in the field of automatic physiological signal analysis and diagnosis. Considerable researches have been done on the automatic classification of pulse patterns according to their features of position and shape, but because arrhythmic pulses are difficult to identify, until now none has been done to automatically identify pulses by their rhythms. This paper proposes a novel approach to the detection of arrhythmic pulses using the Lempel-Ziv complexity analysis. Four parameters, one lemma, and two rules, which are the results of heuristic approach, are presented. This approach is applied on 140 clinic pulses for detecting seven pulse patterns, not only achieving a recognition accuracy of 97.1% as assessed by experts in TCM, but also correctly extracting the periodical unit of the intermittent pulse.