Evaluating changes in pulse transit time drop index in patients with obstructive sleep apnea before and during CPAP therapy

Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with m...

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Published inThe clinical respiratory journal Vol. 16; no. 9; pp. 611 - 617
Main Authors Kalantari, Elham, Kalantari, Forough, Edalatifard, Maryam, Rahimi, Besharat
Format Journal Article
LanguageEnglish
Published Copenhagen John Wiley & Sons, Inc 01.09.2022
John Wiley and Sons Inc
Wiley
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Online AccessGet full text
ISSN1752-6981
1752-699X
1752-699X
DOI10.1111/crj.13532

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Abstract Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross‐sectional study. Split‐night polysomnography (PSG) study was performed for each participant with apnea‐hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy (P < 0.001). PTT was significantly correlated to sleep efficiency (rs = −0.376, P = 0.049) and oxygen desaturation index (ODI) (rs = −0.428, P = 0.018). PTT drop index was strongly correlated to AHI (rs = 0.802, P < 0.001), respiratory disturbance index (RDI) (rs = 0.807, P < 0.001), ODI (rs = 0.693, P < 0.001), arousal index (rs = 0.807, P < 0.001), and periodic leg movement (PLM) index (rs = 0.400, P = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non‐invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA. Here, we evaluated changes in pulse transmission time (PTT) drop index before and during CPAP therapy in patients with obstructive sleep apnea. PTT drop index significantly decreased after CPAP therapy. PTT drop index was strongly correlated to AHI, RDI, ODI, arousal index, and PLM index.
AbstractList Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross-sectional study. Split-night polysomnography (PSG) study was performed for each participant with apnea-hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy (P < 0.001). PTT was significantly correlated to sleep efficiency (rs  = -0.376, P = 0.049) and oxygen desaturation index (ODI) (rs  = -0.428, P = 0.018). PTT drop index was strongly correlated to AHI (rs  = 0.802, P < 0.001), respiratory disturbance index (RDI) (rs  = 0.807, P < 0.001), ODI (rs  = 0.693, P < 0.001), arousal index (rs  = 0.807, P < 0.001), and periodic leg movement (PLM) index (rs  = 0.400, P = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non-invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA.Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross-sectional study. Split-night polysomnography (PSG) study was performed for each participant with apnea-hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy (P < 0.001). PTT was significantly correlated to sleep efficiency (rs  = -0.376, P = 0.049) and oxygen desaturation index (ODI) (rs  = -0.428, P = 0.018). PTT drop index was strongly correlated to AHI (rs  = 0.802, P < 0.001), respiratory disturbance index (RDI) (rs  = 0.807, P < 0.001), ODI (rs  = 0.693, P < 0.001), arousal index (rs  = 0.807, P < 0.001), and periodic leg movement (PLM) index (rs  = 0.400, P = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non-invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA.
Abstract Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross‐sectional study. Split‐night polysomnography (PSG) study was performed for each participant with apnea‐hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy (P < 0.001). PTT was significantly correlated to sleep efficiency (rs = −0.376, P = 0.049) and oxygen desaturation index (ODI) (rs = −0.428, P = 0.018). PTT drop index was strongly correlated to AHI (rs = 0.802, P < 0.001), respiratory disturbance index (RDI) (rs = 0.807, P < 0.001), ODI (rs = 0.693, P < 0.001), arousal index (rs = 0.807, P < 0.001), and periodic leg movement (PLM) index (rs = 0.400, P = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non‐invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA.
Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross‐sectional study. Split‐night polysomnography (PSG) study was performed for each participant with apnea‐hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy (P < 0.001). PTT was significantly correlated to sleep efficiency (rs = −0.376, P = 0.049) and oxygen desaturation index (ODI) (rs = −0.428, P = 0.018). PTT drop index was strongly correlated to AHI (rs = 0.802, P < 0.001), respiratory disturbance index (RDI) (rs = 0.807, P < 0.001), ODI (rs = 0.693, P < 0.001), arousal index (rs = 0.807, P < 0.001), and periodic leg movement (PLM) index (rs = 0.400, P = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non‐invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA.
Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross‐sectional study. Split‐night polysomnography (PSG) study was performed for each participant with apnea‐hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy (P < 0.001). PTT was significantly correlated to sleep efficiency (rs = −0.376, P = 0.049) and oxygen desaturation index (ODI) (rs = −0.428, P = 0.018). PTT drop index was strongly correlated to AHI (rs = 0.802, P < 0.001), respiratory disturbance index (RDI) (rs = 0.807, P < 0.001), ODI (rs = 0.693, P < 0.001), arousal index (rs = 0.807, P < 0.001), and periodic leg movement (PLM) index (rs = 0.400, P = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non‐invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA. Here, we evaluated changes in pulse transmission time (PTT) drop index before and during CPAP therapy in patients with obstructive sleep apnea. PTT drop index significantly decreased after CPAP therapy. PTT drop index was strongly correlated to AHI, RDI, ODI, arousal index, and PLM index.
Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross‐sectional study. Split‐night polysomnography (PSG) study was performed for each participant with apnea‐hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy ( P  < 0.001). PTT was significantly correlated to sleep efficiency ( r s  = −0.376, P  = 0.049) and oxygen desaturation index (ODI) ( r s  = −0.428, P  = 0.018). PTT drop index was strongly correlated to AHI ( r s  = 0.802, P  < 0.001), respiratory disturbance index (RDI) ( r s  = 0.807, P  < 0.001), ODI ( r s  = 0.693, P  < 0.001), arousal index ( r s  = 0.807, P  < 0.001), and periodic leg movement (PLM) index ( r s  = 0.400, P  = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non‐invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA.
Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure, which causes a decrease in pulse transit time (PTT). The present study aims to evaluate the effect of CPAP therapy on PTT in patients with moderate to severe OSA. This was a cross‐sectional study. Split‐night polysomnography (PSG) study was performed for each participant with apnea‐hypopnea index (AHI) ≥ 15 before and during CPAP therapy. The PTT was calculated as the time interval between the R wave of the electrocardiogram and the following arrival point in fingertip photoplethysmography. PTT drop was defined as a fall in the PTT curve of ≥15 ms lasting at least for 3 s and at most for 30 s. PTT drop index was defined as the number of drops in PTT that occur per hour of sleep. A total of 30 patients were included. PTT significantly increased, and PTT drop index significantly decreased during CPAP therapy ( P  < 0.001). PTT was significantly correlated to sleep efficiency ( r s  = −0.376, P  = 0.049) and oxygen desaturation index (ODI) ( r s  = −0.428, P  = 0.018). PTT drop index was strongly correlated to AHI ( r s  = 0.802, P  < 0.001), respiratory disturbance index (RDI) ( r s  = 0.807, P  < 0.001), ODI ( r s  = 0.693, P  < 0.001), arousal index ( r s  = 0.807, P  < 0.001), and periodic leg movement (PLM) index ( r s  = 0.400, P  = 0.035). Overall, the findings from this study indicated that the PTT drop index is a non‐invasive and useful marker for evaluating the severity of OSA and the effectiveness of treatment in patients with moderate to severe OSA. Here, we evaluated changes in pulse transmission time (PTT) drop index before and during CPAP therapy in patients with obstructive sleep apnea. PTT drop index significantly decreased after CPAP therapy. PTT drop index was strongly correlated to AHI, RDI, ODI, arousal index, and PLM index.
Author Kalantari, Elham
Rahimi, Besharat
Kalantari, Forough
Edalatifard, Maryam
AuthorAffiliation 3 Advanced Thoracic Research Center Tehran University of Medical Sciences Tehran Iran
1 Department of Pulmonology Isfahan University of Medical Sciences Isfahan Iran
2 Department of Nuclear Medicine, Rasoul Akram Hospital Iran University of Medical Sciences Tehran Iran
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Snippet Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood pressure,...
Abstract Airflow limitation in patients with obstructive sleep apnea (OSA) leads to arousal, increased sympathetic nervous system activity, and elevated blood...
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StartPage 611
SubjectTerms continuous positive airway pressure
CPAP
Health risks
obstructive sleep apnea
Original
pulse transit time
Sleep apnea
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Title Evaluating changes in pulse transit time drop index in patients with obstructive sleep apnea before and during CPAP therapy
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