<i>Respiratory Factors Affecting Pulmonary Arterial Blood Pressure and Flow Through the Lungs</i>

Heiman, Donald F.; Rodbard, Simon; Shaffer, Aaron B.; Snider, Gordon L.

doi:10.1152/jappl.1957.10.1.31

Cited by 18 publications

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“…Inspiration vs. expiration likely has some influence on either the size of the MPA or the aorta. Respiratory‐induced fluctuations in intrathoracic pressure measured by esophageal balloon catheterization are known to cause variation in the luminal pulmonary arterial pressures measured by pulmonary artery catheterization . The walls of the large pulmonary arteries are elastic .…”

Section: Discussionmentioning

confidence: 99%

Computed Tomographic Measurement of the Main Pulmonary Artery to Aortic Diameter Ratio in Healthy Dogs: A Comparison to Echocardiographically Derived Ratios

Granger¹,

Pariaut²,

Vila³

et al. 2016

Vet Radiology Ultrasound

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Indicators of pulmonary hypertension in dogs examined with thoracic computed tomography (CT) are not well established in the veterinary literature. In humans, the main pulmonary artery to aortic diameter ratio (MPA:Ao) measured via CT, has been shown to be more sensitive than echocardiographic variables for predicting presence and severity of pulmonary hypertension, in some cases. In veterinary literature, the MPA:Ao has been determined echocardiographically to have an upper limit of about 1:1. Measurement of this ratio has not been described in dogs using CT. The objectives of this cross-sectional, prospective study were to compare echocardiographic measurement of MPA:Ao with that obtained via CT, determine if measurement of MPA:Ao via CT is repeatable and reproducible, and determine the effect of respiration and contrast administration on the measurement of MPA:Ao via CT. Ten healthy dogs without pulmonary hypertension were anesthetized to undergo thoracic CT using three protocols and echocardiography. The MPA:Ao was measured three times by three observers for each of the three CT protocols and compared to echocardiographic measurements. The mean MPA:Ao measured among all observers and CT protocols was 1.108 ± 0.152 (SD). The effect of CT scan protocol on MPA:Ao significantly differed among the three methods (P = 0.0014), where expiratory scans had lower MPA:Ao than inspiratory scans. The ratio measured on inspiratory CT scans consistently overestimated MPA:Ao when compared to echocardiography (bias = 0.226). Findings did not support the echocardiographically derived upper limit of MPA:Ao as an upper limit for determination of main pulmonary arterial enlargement on CT.

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Section: Discussionmentioning

confidence: 99%

Computed Tomographic Measurement of the Main Pulmonary Artery to Aortic Diameter Ratio in Healthy Dogs: A Comparison to Echocardiographically Derived Ratios

Granger¹,

Pariaut²,

Vila³

et al. 2016

Vet Radiology Ultrasound

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“…The human body is one entity, and all the processes are relevant—in- and exhalation influence the circulatory system. Specifically, during in- and exhalation, the pulmonary arterial end-diastolic pressure is changing accordingly, affecting the pressure in the pulmonary artery [ 51 ]. The effect is revealed as modulations on pulse waves—carried throughout the circulatory system.…”

Section: Discussionmentioning

confidence: 99%

Sensor-Location-Specific Joint Acquisition of Peripheral Artery Bioimpedance and Photoplethysmogram for Wearable Applications

Metshein,

Abdullayev,

Gautier

et al. 2023

Sensors

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Background: Cardiovascular diseases (CVDs), being the culprit for one-third of deaths globally, constitute a challenge for biomedical instrumentation development, especially for early disease detection. Pulsating arterial blood flow, providing access to cardiac-related parameters, involves the whole body. Unobtrusive and continuous acquisition of electrical bioimpedance (EBI) and photoplethysmography (PPG) constitute important techniques for monitoring the peripheral arteries, requiring novel approaches and clever means. Methods: In this work, five peripheral arteries were selected for EBI and PPG signal acquisition. The acquisition sites were evaluated based on the signal morphological parameters. A small-data-based deep learning model, which increases the data by dividing them into cardiac periods, was proposed to evaluate the continuity of the signals. Results: The highest sensitivity of EBI was gained for the carotid artery (0.86%), three times higher than that for the next best, the posterior tibial artery (0.27%). The excitation signal parameters affect the measured EBI, confirming the suitability of classical 100 kHz frequency (average probability of 52.35%). The continuity evaluation of the EBI signals confirmed the advantage of the carotid artery (59.4%), while the posterior tibial artery (49.26%) surpasses the radial artery (48.17%). The PPG signal, conversely, commends the location of the posterior tibial artery (97.87%). Conclusions: The peripheral arteries are highly suitable for non-invasive EBI and PPG signal acquisition. The posterior tibial artery constitutes a candidate for the joint acquisition of EBI and PPG signals in sensor-fusion-based wearable devices—an important finding of this research.

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Cor pulmonale

Matthes¹,

Ulmer²,

Wittekind³

1960

Herz Und Kreislauf

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Respiratory Factors Affecting Pulmonary Arterial Blood Pressure and Flow Through the Lungs

Cited by 18 publications

References 0 publications

Computed Tomographic Measurement of the Main Pulmonary Artery to Aortic Diameter Ratio in Healthy Dogs: A Comparison to Echocardiographically Derived Ratios

Computed Tomographic Measurement of the Main Pulmonary Artery to Aortic Diameter Ratio in Healthy Dogs: A Comparison to Echocardiographically Derived Ratios

Sensor-Location-Specific Joint Acquisition of Peripheral Artery Bioimpedance and Photoplethysmogram for Wearable Applications

Cor pulmonale

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