Assessment of Primary Care Physicians' Use of a Pocket Ultrasound Device to Measure Left Ventricular Mass in Patients with Hypertension.

PURPOSE: Left ventricular hypertrophy (LVH) is common in primary care and is associated with increased morbidity and mortality. Treatment of underlying hypertension can reverse LVH and eliminate the associated risks. Electrocardiography is widely available and commonly used to screen hypertensive patients for LVH, but it is limited by low sensitivity. Limited echocardiographic measurement of the left ventricle is a method for screening with improved sensitivity; however, it is not currently widely used in the primary care setting. This study attempts to test the accuracy of primary care physicians' (PCPs) measurements of the left ventricle using a pocket-sized ultrasound (pUS) device after a brief training session. METHODS: This study was performed in an outpatient cardiology clinic by 3 family medicine residents and 1 family medicine faculty member after a 4-hour training session. Measurements of the left ventricle were made by PCPs using a pUS device; these measurements were compared with cardiologists' measurements from images obtained by echocardiography technicians. Left ventricular mass index (LVMI) was calculated based on these measurements and then compared between groups. RESULTS: There was no statistically significant difference between the mean LVMI calculations in the 2 groups. The agreement in measurements between the groups, however, showed high variability. This was manifested by the low sensitivity (70%) and specificity (76%) of PCPs in the detection of LVH. CONCLUSIONS: This study showed that limited echocardiography for the detection of LVH performed by PCPs at the point of care was feasible. Future studies are needed to determine the ideal training and experience necessary to yield competency.

Military family physicians' perceptions of a pocket point-of-care ultrasound device in clinical practice.

Point-of-care ultrasonography with a pocket ultrasound device, General Electric Medical Systems Vscan (Milwaukee, Wisconsin), has been shown to be effective and easy to learn. However, no studies to date have evaluated its use in the military primary care setting where its portability and value in bedside diagnosis would be especially beneficial. We tested the feasibility of the Vscan in the day-to-day care of patients by family physicians in their clinic, inpatient wards, and its potential for use in the military-deployed setting. Participants were trained and credentialed in the use of the point-of-care ultrasonography. Then, participants were provided with a pocket ultrasound device to use in their normal day-to-day practice. Additionally, participants completed surveys and provided ratings on their perceptions regarding the use of the device. According to the survey analysis, participants found the devices to be easy to use, valuable in discerning a diagnosis, and were not prohibitively time consuming. Moreover, patients were perceived by the participants to have been satisfied with the use of the device. Overall, participants had high satisfaction with the Vscan and perceived that the device would be highly valuable in the military-deployed setting.