Noninvasive arterial blood pressure waveforms in patients with continuous-flow left ventricular assist devices.

Arterial blood pressure and echocardiography may provide useful physiological information regarding cardiac support in patients with continuous-flow left ventricular assist devices (cf-LVADs). We investigated the accuracy and characteristics of noninvasive blood pressure during cf-LVAD support. Noninvasive arterial pressure waveforms were recorded with Nexfin (BMEYE, Amsterdam, The Netherlands).

Noninvasive continuous arterial blood pressure monitoring with Nexfin®.

Background: If invasive measurement of arterial blood pressure is not warranted, finger cuff technology can provide continuous and noninvasive monitoring. Finger and radial artery pressures differ; Nexfin® (BMEYE, Amsterdam, The Netherlands) measures finger arterial pressure and uses physiologic reconstruction methodologies to obtain values comparable to invasive pressures.

Methods: Intra-arterial pressure (IAP) and noninvasive Nexfin arterial pressure (NAP) were measured in cardiothoracic surgery patients, because invasive pressures are available.

Noninvasive cardiac output monitoring during exercise testing: Nexfin pulse contour analysis compared to an inert gas rebreathing method and respired gas analysis.

Purpose: Exercise testing is often used to assess cardiac function during physical exertion to obtain diagnostic information. However, this procedure is limited to measuring the electrical activity of the heart using electrocardiography and intermittent blood pressure (BP) measurements and does not involve the continuous assessment of heart functioning. In this study, we compared continuous beat-to-beat pulse contour analysis to monitor noninvasive cardiac output (CO) during exercise with inert gas rebreathing and respired gas analysis.

Noninvasive blood pressure measurement by the Nexfin monitor during reduced arterial pulsatility: a feasibility study.

Noninvasive blood pressure measurements are difficult when arterial pulsations are reduced, as in patients supported by continuous flow left ventricular assist devices (cf-LVAD). We evaluated the feasibility of measuring noninvasive arterial blood pressure with the Nexfin monitor during conditions of reduced arterial pulsatility. During cardiopulmonary bypass(CPB) in which a roller pump based or a centrifugal pump based heart-lung machine generated arterial blood pressure with low pulsatility, noninvasive arterial pressures (NAP)measured by the Nexfin Monitor were recorded and compared with invasively measured radial artery pressures (IAP).

ST segment depression criteria and the prevalence of silent cardiac ischemia in hypertensives.

The reported prevalence of silent cardiac ischemia as assessed by ambulatory electrocardiographic recording varies widely. The influence of the stringency of the analysis criteria has never been reported. We performed 24-hour, 12-lead ambulatory electrocardiographic recording in patients with hypertension but without proven coronary artery disease.

Diagnostic value of simultaneous non-invasive continuous, ambulatory finger blood pressure and electrocardiogram monitoring in a patient with hypertrophic obstructive cardiomyopathy.

Background: The pathophysiology of hypertrophic obstructive cardiomyopathy (HOCM) is complex and heterogeneous, and it may be difficult to disentangle the various pathophysiologic properties leading to complaints.

Objectives: To elucidate the sequence of acute pathophysiologic changes leading to complaints in a patient with HOCM.

Methods: Cardiopres measurements [the combination of non-invasive, continuous finger artery blood pressure monitoring, and three-lead electrocardiogram (ECG) recordings] were performed during physiologic, supine exercise--before and after replacement of metoprolol by verapamil.

Comparison of Portapres with standard sphygmomanometry in pregnancy.

Background: Continuous beat-to-beat noninvasive blood pressure (BP) measurement is possible with Portapres. It constructs finger arterial waveforms beat-to-beat. Dedicated software is used to analyze the arterial waveforms.