Cardiac monitoring for patients with palpitations

Palpitations are one of the most common reasons for medical consultation. Theytend to worry patients and can affect their quality of life. They are often asymptom associated with cardiac rhythm disorders, although there are otheretiologies. For diagnosis, it is essential to be able to reliably correlate the symptomswith an electrocardiographic record allowing the identification or rulingout of a possible rhythm disorder. However, reaching a diagnosis is not alwayssimple, given that they tend to be transitory symptoms and the patient isfrequently asymptomatic at the time of assessment. In recent years, electrocardiographicmonitoring systems have incorporated many technical improvements thatsolve several of the 24-h Holter monitor limitations. The objective of this review isto provide an update on the different monitoring methods currently available,remarking their indications and limitations, to help healthcare professionals toappropriately select and use them in the work-up of patients with palpitations.

STUDY AND APPLICATION ABOUT COMPUTED SYSTEM FOR EXTERNAL CARDIAC MASSAGE, MONITOR OF HEART AND BODY TEMPERATURE

Objective:To make and study computed system for external cardiac massage,monitor of heart and body temperature and observe its clinical effect.Method:The system was made and applied.Result:The effect of system was obvious.Conclusion: The system was an effective clinical equipment in treatment of patient with cardiac arrest.

Current Status and Development Tendency of Wearable Cardiac Health Monitoring

Wearable cardiac monitoring devices can provide uninterrupted monitoring of cardiac activities over a long period of time.They have developed rapidly in recent years in terms of convenience,comfort,and intelligence.Aided by the development of sensor and materials technology,big data and artificial intelligence,wearable cardiac monitoring can become a crucial basis for novel medical models in the future.Herein,the basic concepts and representative devices of wearable cardiac monitoring are first introduced.Subsequently,its core technologies and the latest representative research progress in physiology signal sensing,signal quality enhancement,and signal reliability are systematically reviewed.Finally,an insight and outlook on the future development trends and challenges of wearable cardiac monitoring are discussed.

Accuracy of the ultrasonic cardiac output monitor in healthy term neonates during postnatal circulatory adaptation

Background Echocardiography is regarded as a gold standard for measuring hemodynamic values. The ultrasonic cardiac output monitor （USCOM） is a new method for measuring hemodynamics and could provide non-invasive point of care guidance. So far, there are no published USCOM reference values for neonates, nor has USCOM＇s accuracy been established in this population. We aimed to determine the accuracy and clinical utility of the USCOM in healthy neonates relative to published echocardiographic data, to establish normal hemodynamic parameters that it measures, and to assess the possible role of USCOM as an alternative to echocardiography as a trend monitor. Methods Right and left heart hemodynamics of 90 normal neonates were measured during circulatory adaptation over the first three days of life using the USCOM and automated oscillotonometry. Results Heart rate showed a significant decline from days one to three, from 126 to 120 （P〈0.001）. Systolic, diastolic and mean arterial pressures all increased significantly from 66 to 71 mmHg, 33 to 38 mmHg and 44 to 49 mmHg, respectively （P 〈0.001 in each case）. Right ventricular cardiac index （RV-CI） showed no change with a mean of 5.07 L.minl.m2. Left ventricular cardiac index （LV-CI） declined from 3.43 to 3.00 L.minl.m2 （P 〈0.001）. RV-CI exceeded LV-CI on all three days by a mean of 61%. The systemic vascular resistance index （SVRI）, based on LV-CI, increased significantly over the three days from 1083 to 1403 dyne.sec.cm5.m2 （P 〈0.001）. Conclusions Normal neonatal hemodynamic values, as indicated by USCOM, were established. LV-CI measurement showed excellent agreement with published echocardiographic studies. RV-CI was constant and exceeded LV-CI for all three days of this study. It may be falsely high due to flow velocity measurement errors arising from the pulmonary branch arteries, and may represent a limitation of the USCOM method. The progressive rise of arterial pressure and SVRI despite a declining LV-CI may indicate functional closure of the ductus arteriosus, with the greatest change occurring within the first 24 hours. Evidence of closure of the foramen ovale was not observed.