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("ECG" OR "EKG") AND ("U Wave")

Stephen W Smith, Brooks Walsh, Ken Grauer, Kyuhyun Wang, Jeremy Rapin, Jia Li, William Fennell, Pierre Taboulet
BACKGROUND: Cardiologs® has developed the first electrocardiogram (ECG) algorithm that uses a deep neural network (DNN) for full 12‑lead ECG analysis, including rhythm, QRS and ST-T-U waves. We compared the accuracy of the first version of Cardiologs® DNN algorithm to the Mortara/Veritas® conventional algorithm in emergency department (ED) ECGs. METHODS: Individual ECG diagnoses were prospectively mapped to one of 16 pre-specified groups of ECG diagnoses, which were further classified as "major" ECG abnormality or not...
November 16, 2018: Journal of Electrocardiology
Arttu Holkeri, Antti Eranti, M Anette Haukilahti, Tuomas Kerola, Tuomas V Kenttä, Kai Noponen, Tapio Seppänen, Harri Rissanen, Markku Heliövaara, Paul Knekt, M Juhani Junttila, Heikki V Huikuri, Aapo L Aro
Negative U-waves are a relatively rare finding in an electrocardiogram (ECG), but are often associated with cardiac disease. The prognostic significance of negative U-waves in the general population is unknown. We evaluated 12-lead ECGs of 6,518 adults (45% male, mean age 50.9 ± 13.8 years) for the presence of U-waves, and followed the subjects for 24.5 ± 10.3 years. Primary end points were all-cause mortality, cardiac mortality, and sudden cardiac death; secondary end point was hospitalization due to cardiac causes...
January 15, 2019: American Journal of Cardiology
F Extramiana, O Milleron, S Elbitar, A Uccellini, M Langeois, M Spentchian, G Delorme, F Arnoult, I Denjoy, C Bouleti, V Fressart, F Iserin, P Maison-Blanche, M Abifadel, A Leenhardt, C Boileau, G Jondeau
Mutations in the TGFβR2 gene have been associated with a life threatening risk of aortic dissection but no arrhythmic death has been previously reported. Two young females carrying a TGFβR2 mutation, initially diagnosed as Marfan syndrome or Loeys Dietz syndrome, presented sudden death with autopsy ruling out dissection. The ECGs of the 2 Sudden Cardiac Deaths revealed profound ventricular repolarization abnormalities with a sinusoidal T-U morphology associated with normal left ventricular ejection fraction...
August 29, 2018: Scientific Reports
M S Al-Karadi, A J Wilkinson, J Caldwell, P Langley
Major cardiac organisations recommend U wave abnormalities should be reported during ECG interpretation. However, U waves cannot be measured in patients with atrial fibrillation (AF) due to the obscuring fibrillatory wave. The aim was to validate a U wave measurement algorithm for AF patients. Multi-beat averaging was applied to ECGs of 25 patients during paroxysms of AF and the presence of U waves compared to those from the same patients during sinus rhythm (SR). In a further database of 10 long-term AF recordings, the number of beats for effective U wave extraction by the algorithm was calculated...
August 9, 2018: Scientific Reports
Jason An, Branko Braam
Rationale: We hope to increase awareness that hypokalemic paralysis may be the first presentation of Sjögren syndrome, for which potassium-sparing diuretics can be an effective adjunct to potassium replenishment. Presenting concerns: A 73-year-old female presented to a peripheral hospital with quadriparesis and a critically low serum potassium of 1.6 mmol/L with U waves on the electrocardiogram (ECG). The initial arterial blood gas showed a pH of 7.19, bicarbonate of 13 mEq/L, and a CO2 of 35 mm Hg...
2018: Canadian Journal of Kidney Health and Disease
Joris M G Theunissen, Heleen Lameijer
CLINICAL INTRODUCTION: A 44-year-old woman presents pain free to our ED after experiencing 45 min of tightening of the chest with radiation to her left arm, diaphoresis and nausea. Her vital signs are normal except for her high BP, which is 180/110. She reports recurrent episodes of chest pain in the past 1.5 weeks, unrelated to exercise. She visited a general practitioner who prescribed pain medication and treated her new-onset hypertension. Besides the recently found hypertension, heavy smoking is her only other traditional risk factor for cardiovascular disease...
April 2018: Emergency Medicine Journal: EMJ
Chunlin Yin, Ping Zhang, Jing Yang, Li Zhang
A 26-year-old woman, 12 days in postpartum, developed recurrent syncope and cardiac arrest. Her ECG revealed QT-prolongation associated with LQT2-specific T-U wave patterns, T wave alternans, long QT-dependent torsade de pointes (TdP) and ventricular fibrillation (VF). She also had intermittent LBBB (80bpm) on alternate beats and RBBB at sinus tachycardia (113bpm). Family genotyping revealed a novel de novo missense mutation G604C of KCNH2. Propranolol slowed heart rate and further prolonged QT interval (610ms) that caused TdP recurrence...
January 2018: Journal of Electrocardiology
Aqian Wang, Xiang Li, Muhammad Nabeel Dookhun, Tiancheng Zhang, Ping Xie, Yunshan Cao
RATIONALE: Prominent J waves can be seen in life-threatening cardiac arrhythmias such as Brugada syndrome, early repolarization syndrome, and ventricular fibrillation. We herein present an unusual case report of hypokalemia-induced J wave syndrome and ST (a part of ECG) segment elevation. PATIENTS CONCERNS: A 52-year-old woman with chief complaints of chest pain for 2 hours and diarrhea showed a marked hypokalemia (2.8 mmol/L) and slightly elevated creatine kinase-MB (CK-MB) (57...
September 2017: Medicine (Baltimore)
Martin Bell Lybecker, Henrik Bjørnsgaard Madsen, Jens Meldgaard Bruun
Hypokalaemic paralysis covers a heterogeneous group of disorders caused either by an enhanced shift of potassium into the cells or following a significant renal or gastrointestinal loss of potassium. We present the case of a 48-year-old Caucasian man with paralysis of both upper and lower extremities. ECG showed sinus rhythm and characteristic changes of hypokalaemia with depression of the ST segment, prolonged QTc interval of 581ms and U waves seen as a small positive deflection at the T wave in the middle precordial leads...
July 27, 2017: BMJ Case Reports
Nilukshana Yogendranathan, H M M T B Herath, S P Pahalagamage, Aruna Kulatunga
BACKGROUND: ST elevation Myocardial infarction is a medical emergency. A variety of noncardiac conditions had been known to mimic the ECG changes that are seen in acute coronary syndrome. Although the common ECG changes that are documented with raised intracranial pressure are T inversions, prolongation of QT interval and sinus bradycardia, ST elevation or depression, arrhythmias and prominent U waves have also been recognized. However, ST elevations in association with primary intracranial tumours are rarely reported...
April 4, 2017: BMC Cardiovascular Disorders
Mathew Kurian Vithayathil, Matthew Edwards
A previously well woman aged 63 years presents to the emergency department with vomiting, palpitations and 3 presyncopal episodes. She had no previous medical or cardiac history, with the patient stating that she tried a herbal remedy of boiled comfrey leaves for insomnia 18 hours before arrival to the department. Her ECG showed multiple abnormalities, including bradycardia, second-degree atrioventricular node block, Mobitz Type 2, a shortened QT interval, downsloping ST depression and presence of U waves...
December 1, 2016: BMJ Case Reports
Haibo Tao, Yanru Man, Xiaoyuan Shi, Jun Zhu, Hang Pan, Qin Qin, Shanrong Liu
Barium is a heavy divalent alkaline earth metal that has been known as a muscle poison. Barium can cause human toxicity, which may lead to significant hypokalemia and have serious consequences. This paper reports a case of unprecedented barium intoxication in which the patient, who suffered from depression, swallowed at least 3.0 g barium chloride to commit suicide. On admission, the patient presented with nausea, vomiting, stomach burning feeling, dizziness, and weakness. Emergency biochemical testing showed that the patient was suffering from severe hypokalemia (K(+) 1...
2016: Case Reports in Medicine
E Berra, M Gonzales, A Bersali, A Persu
OBJECTIVE: Pheochromocytomas and paragangliomas (PPGLs) are catecholamine-producing tumours of chromaffin cells of the adrenal medulla and extra-adrenal paraganglia. Besides hypertension, they can be at the origin of a wide range of cardiovascular manifestations, including cardiac electric abnormalities such as long QT interval, ventricular tachycardia and torsades de pointe. However, knowledge about PPGL-related arrhythmias is scarce and mostly derived from case reports. The aim of our study was to evaluate the prevalence, nature and reversibility of cardiac electric changes and arrhythmias in patients with PPGLs...
September 2016: Journal of Hypertension
Emre Gezer, Banu Şarer Yurekli, Gokçen Unal Kocabas
No abstract text is available yet for this article.
July 2016: Hormones: International Journal of Endocrinology and Metabolism
Nurettin Ozgur Dogan, Nazire Avcu, Elif Yaka, Ali Isikkent, Ugur Durmus
Hypokalemic periodic paralysis is a rare but serious disorder that is typically caused by a channelopathy. Thyrotoxicosis, heavy exercise, high carbohydrate meal and some drugs can trigger channelopathy in genetically predisposed individuals. A 33-year-old male patient presented to the emergency department with weakness in the lower extremities. He stated that he had done heavy physical activity during the previous week. The patient exhibited motor weakness in the lower extremities (2/5 strength) during the physical examination...
June 2015: Turkish Journal of Emergency Medicine
D Luke Glancy, Pranav M Diwan
Sinus rhythm; an atrial premature complex; sagging ST-segments, low T-waves, and prominent U-waves suggesting hypokalemia. The ST-T and U-wave changes described above are characteristic of hypokalemia. When the serum potassium level is between 3.0 and 3.5 mEq/L, one or more of the findings may be present. All three are common when the serum potassium level is below 2.5 mEq/L. At the lowest serum potassium levels the T-wave becomes a notch on the upstroke of a giant U-wave, as occurs here in the ECG of this woman with a serum potassium of 1...
May 2015: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
Kohei Hasegawa, Tomofumi Takaya, Shumpei Mori, Fumitaka Soga, Hachidai Takahashi, Daisuke Terashita, Hiromasa Otake, Ken-Ichi Hirata
A 73-year-old man was admitted to our hospital because of chest pain at rest. Electrocardiography (ECG) showed an ST-segment depression, a negative U-wave in the precordial leads, and a right axis deviation (RAD) tendency. Coronary angiography revealed occlusion of the right coronary artery. Collateral flow from the jeopardized left anterior descending artery to the posterior descending artery (PDA) was fair. After successful revascularization, improvement in the ECG findings was noted. Since blood supply to the left posterior fascicle is dependent on the PDA, the RAD tendency could be explained by the presence of a transient ischemic left posterior hemiblock...
May 25, 2016: International Heart Journal
Piotr Kukla, Marek Jastrzębski, Kamil Fijorek, Sebastian Stec, Leszek Bryniarski, Danuta Czarnecka, Adrian Baranchuk
BACKGROUND: Acquired long QT syndrome (a-LQTS) is associated with life-threatening ventricular arrhythmias, mainly torsades de pointes (TdP). ECG parameters predicting evolving into ventricular fibrillation (VF) are ill defined. AIMS: To determine ECG parameters preceding and during TdP associated with higher risk of developing VF. METHODS: We analyzed 151 episodes of TdP, recorded in 28 patients with a-LQTS (mean QTc 638 ms ± 57). RESULTS: All 28 patients had prolonged QT interval, (mean QTc 638 ms ± 57) ranging from 502 ms to 858 ms correcting by Bazett's formula...
November 2016: Annals of Noninvasive Electrocardiology
Norin Chai, Jean Louis Pouchelon, Jonathan Bouvard, Leonor Camacho Sillero, Minh Huynh, Vincent Segalini, Lisa Point, Veronica Croce, Goulven Rigaux, Jack Highwood, Valérie Chetboul
Electrocardiography represents a relevant diagnostic tool for detecting cardiac disease in animals. Elephants can present various congenital and acquired cardiovascular diseases. However, few electrophysiologic studies have been reported in captive elephants, mainly due to challenging technical difficulties in obtaining good-quality electrocardiogram (ECG) tracings, and no data are currently available for free-ranging Asian elephants (Elephas maximus). The purpose of this pilot prospective study was to evaluate the feasibility of using a simple method for recording ECG tracings in wild, apparently healthy, unsedated Asian elephants (n = 7) in the standing position...
March 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
Yoshiaki Omura, Dominic Lu, Marilyn K Jones, Abdallah Nihrane, Harsha Duvvi, Dario Yapor, Yasuhiro Shimotsuura, Motomu Ohki
Lyme disease is found in a majority of people we tested. Once Borrelia Burgdorferi (B.B.) spirochete enters human body, it not only causes pain by infecting joints, but it also often enters the brain and the heart. Infection of brain can be quickly detected from the pupil and infection of the heart by ECGs non-invasively. By evaluating recorded ECGs of atrial fibrillation (AF), using U.S. patented non-invasive highly sensitive electromagnetic field (EMF) resonance phenomenon between 2 identical molecules or between a molecule and its antibody, we examined 25 different AF patients' ECGs and found the majority of them suffer from various degrees of B...
2015: Acupuncture & Electro-therapeutics Research
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