Tricuspid annular plane systolic excursion (TAPSE) in chronic obstructive pulmonary disease patients: a systematic review and meta-analysis
Article information
Abstract
Objective
Tricuspid annular plane systolic excursion (TAPSE) is an echocardiographic parameter that serves as a prognostic indicator for the severity of chronic obstructive pulmonary disease (COPD) clinical course. This study, consisting of a systematic review and meta-analysis, evaluates the current literature to elucidate the relationship between TAPSE measurement in COPD patients versus control subjects to discern baseline evidence of right heart strain.
Methods
PubMed, Scopus, CINAHL, Web of Science, and Cochrane Library databases were searched from their beginnings through November 1, 2023, for eligible studies. Outcomes included the difference of TAPSE measurement and right ventricular (RV) wall thickness between COPD patients and control patients. The Newcastle-Ottawa Scale was applied to assess risk of bias, Q-statistics and I2 values were used to assess for heterogeneity, and Egger and Begg tests were used to assess publication bias.
Results
The search yielded 11 studies reporting TAPSE values involving 1,671 patients, 800 (47.9%) of which had COPD. The unadjusted mean TAPSE value for COPD patients was 18.9±4.0 mm, while the mean TAPSE value for control patients was 22.2±0.8 mm. The presence of COPD was significantly associated with decreased TAPSE values, with the meta-analysis reporting the mean difference in TAPSE value at –3.0 (95% confidence interval, –4.3 to –1.7; P=0.001) between COPD and control patients. Six studies reported the RV free wall thickness [19,21,22,26–28]. The unadjusted mean RV free wall thickness for COPD patients was 4.9±1.2 mm, and for control patients was 3.4±0.7 mm.
Conclusion
This meta-analysis demonstrated statistically significant lower TAPSE values and thicker RV free wall among COPD patients as compared with control patients.
INTRODUCTION
Chronic obstructive pulmonary disease (COPD) affects an estimated 16.4 million adults in the United States; COPD is also a common reason for visits to the emergency department (ED) [1]. The incidence of pulmonary hypertension (PH) and cor pulmonale in these patients is a significant predictor of mortality; however, the true prevalence is unknown. In one large study the prevalence was reported to be 47.6% [2], but other studies have reported incidence anywhere from 20% to 90% [3]. Currently, there are limited medical therapies for PH in this group of patients (categorized as group III PH), and as such, the management of the underlying condition in conjunction with supportive care is the main treatment approach.
COPD exacerbation is a frequent cause of ED visit in patients with COPD associated PH. The US Department of Health and Human Services reports that there are about 101.6 ED visits per 10,000 adults [4]. While the pathophysiology behind the PH in this group of patients is complex, the main reason is believed to be chronic hypoxia leading to chronic vasoconstriction. This phenomenon ultimately leads to pulmonary vascular remodeling and permanent increase in pulmonary vascular resistance, leading to PH. Further increase in pulmonary vasoconstriction can occur with physical exertion and during COPD exacerbations where there is more hypoxia. Overcoming high pulmonary arterial pressure places strain on the right ventricle, leading to right ventricular (RV) hypertrophy and eventually dilation/RV failure. The presence of PH on computed tomography has been shown to be a predictor of hospitalization for COPD [5].
Echocardiogram has been shown to be a useful noninvasive tool for evaluation of RV strain and this may be a useful adjuvant when applied to patients with COPD [6]. Tricuspid annular plane systolic excursion (TAPSE) and pulmonary artery systolic pressure (PASP) have been used conventionally to assess for right heart dysfunction secondary to PH. A decreased TAPSE/PASP ratio has been shown to correlate with RV-arterial uncoupling, which occurs when RV contraction cannot overcome RV afterload in advanced PH [7]. In one recent retrospective cohort, a decreased TAPSE/PASP ratio was associated with mortality in COPD exacerbations [8]. A recent study of 110 patients found TAPSE alone to be an equally effective surrogate marker for RV-PA uncoupling in patients with heart failure with reduced ejection fraction [9].
Although typically used to evaluate right heart strain secondary to acute conditions such as pulmonary embolism, TAPSE could also be used to evaluate and measure right heart strain in COPD, where it can be used as an objective marker of the severity of exacerbation and as a major long term prognostic factor. The aim of this review is to investigate TAPSE measurement in COPD patients versus control subjects, to determine if COPD patients have baseline evidence of right heart strain. RV free wall measurement will also be assessed as a surrogate marker for chronicity of patients’ existing lung disease.
METHODS
Ethics statement
This systematic review and meta-analysis did not require institutional review board approval as it did not contain any studies with human participants or animals. The study was registered in PROSPERO (No. CRD42023486939)
Search strategy
Our systematic review and meta-analysis followed 2020 PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analyses) guidelines [10]. PubMed, Scopus, CINAHL (Cumulative Index to Nursing and Allied Health Literature), Web of Science, and Cochrane Library databases were searched from their beginnings to November 1, 2023. Our study followed the PICO (patient, intervention, control, and outcome) format as in the following. (1) Patient: patients with COPD; (2) intervention: any patients who received echocardiogram to measure TAPSE, thickness of RV free wall; (3) control: patients without COPD; and (4) outcome: TAPSE, thickness of RV wall at any time of follow-up by the studies’ authors.
The search terms were “chronic obstructive pulmonary disease” AND "tricuspid annular plane systolic excursion" (Supplementary Material 1). Observational studies (retrospective or prospective), clinical trials, and quasi-experimental trials were eligible. We included any studies in an English language and involving adult patients (age ≥18 years) with COPD and with echocardiographic data. Non–full-text articles (conference proceedings, abstracts), non–original studies (reviews, meta-analysis), and case reports were excluded. We contacted five authors identified in the systematic review (Cuttica et al. [11], Cherneva et al. [12], Avesta et al. [13], Masson Silva et al. [14], Armentaro et al. [15]) to clarify their methods sections but we received no response.
Study selection and data extraction
Two investigators independently screened individual titles and abstracts from the search results. All abstracts required agreement between at least two investigators to move forward to the full-text screening step or to be excluded. Therefore, when there was a discrepancy between the two investigators, a third and senior investigator would serve as a tiebreaker to exclude or move the abstract to the next step. The same tiebreaker approach was utilized as necessary at the full-text screening step.
Data were extracted to a standardized spreadsheet (Microsoft Excel, Microsoft Corp) that included demographic and clinical data. First authors’ names, year of publication, study settings (outpatient vs. inpatient), study design (retrospective vs. prospective), patient population (both control population and COPD patients), age, percentage of female sex, and clinical data (echocardiogram information) were collected. The extracted data were presented as a consensus between investigators, and consequently, we did not calculate inter-rater agreement.
Outcome measurements
The primary outcome was the difference of TAPSE between COPD patients and control patients. Secondary outcome was the difference in the thickness of the RV wall between COPD and control patients.
Quality assessment and heterogeneity
Two investigators independently assessed each included study to assess each study’s quality. The Newcastle-Ottawa Scale [16] was used for all observational studies. The Newcastle-Ottawa Scale assesses observational studies across three domains: quality of outcomes, comparability of groups, and cohort selection. Based on the score from each domain, studies achieving scores ≥7 were ranked as high quality, 4 to 6 as moderate quality, and ≤3 scores as low quality.
For heterogeneity assessment, both the I2 value and Q-statistic were used. These tests, while assessing different aspects of heterogeneity, are still complementary to each other. The I2 value demonstrates the percentage in which the meta-analysis’ effect size was due to true difference between the studies. The Q-statistic tests for the null hypothesis that all studies within our meta-analysis would be similar to the true effect size.
Statistical analysis
Descriptive analyses were used to report data. Continuous variables were reported as mean±standard deviation, and categorical variables as percentages. When continuous variables were reported as median and interquartile range, they were converted to mean±standard deviation for analysis [17,18]. Weighted averages from different subgroups were also used to estimate the population means. A random-effects meta-analysis was used to compare the differences between TAPSE or RV wall thickness when at least three studies reported the same outcome. The mean difference and 95% confidence interval (CI) were reported as the outcome of the random-effects meta-analysis.
Sensitivity analyses with one-study-removed meta-analysis were used to assess whether any one individual study would have undue effect on overall outcome. For this sensitivity analysis, meta-analysis was performed without the first study, then it was performed without the second study, and so on. Thus, if any one study would change the overall effect size, there would be a fluctuation of the overall effect size in the absence of that particular study. To investigate the potential sources of heterogeneity, moderator analyses using categorical variables were performed. The demographic variables most commonly reported by study authors’ (retrospective vs. prospective, outpatient vs. inpatient, and sample size) were collected and used for moderator analyses. Since the sample size of the study was reported using continuous variables, we examined the histograms of the sample sizes and dichotomized it, according to the distribution.
We used Egger and Begg tests to identify the presence of publication bias. When the P-values for both Egger and Begg tests both exceeded 0.05, there was low likelihood of publication bias. We assessed publication bias further by using the funnel plots for both outcomes of TAPSE and RV wall thickness between control and COPD patients. The funnel plot shows the association between study size (y-axis as standard error) and effect size (x-axis). When every study is included, and hence no publication bias, the studies will be spread out evenly on both sides of the central axis, indicating the presence of both negative result and positive result studies. Additionally, smaller studies which would have more sampling variation and more likelihood of statistical significance due to less rigorous methodology, would appear toward the bottom of the funnel plot.
Random-effects meta-analysis, one-study-effect meta-analysis, and moderator analysis were performed by Comprehensive Meta-Analysis ver. 4 (Biostat). All statistical analyses with P<0.05, except the Egger and Begg tests, were considered statistically significant.
RESULTS
Study description
After screening 499 titles and 59 full-text articles, 11 studies [19–29] were included in our analysis (Fig. 1). Among the studies, 10 were prospective observational [19–28], while one was a retrospective study [29] (Table 1). Eight of the studies were conducted in the outpatient setting [19,21–26,28] and three were done in the inpatient setting [20,27,29]. Six studies were considered small studies because they included less than 100 patients total (for both COPD and control patients) [19,23–27], while five studies involved more than 100 patients in total [20–22,28,29]. All studies reported TAPSE values between COPD and control patients at the initial evaluation. Ozben et al. [24] reported the TAPSE values at initial presentation during patients’ exacerbation period, and the TAPSE values after patients’ resolution of symptoms. Pavasini et al. [28] also reported the TAPSE values at patients’ first presentation and then 6 months later. However, the 6-month TAPSE values were not included in our analysis, for consistency with most other studies. Five studies did not report values for RV free wall thickness [20,23–25,29].

PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analyses) flowchart for study selection. CINAHL, Cumulative Index to Nursing and Allied Health Literature; PH, pulmonary hypertension.
The 11 studies included in this meta-analysis involved 1,671 patients, 800 patients (47.9%) with COPD. Of the 1,671 patients, 531 (31.8%) were female, although this number slightly underrepresents the actual number because Vitarelli et al. [19] did not report the number of female patients among the 22 patients in their control group.
Study quality
Since all included studies were observational, the Newcastle-Ottawa Scale was used to assess their qualities. Most studies were graded as having high quality [19–21,23–29], although one study was graded as having moderate quality [22] (Supplementary Table 1).
Primary outcome: comparison of TAPSE values between COPD and control patients
All 11 studies reported TAPSE values. The unadjusted mean TAPSE value for COPD patients was 18.9± 4.0 mm, while the mean TAPSE value for control patients was 22.2±0.8 mm. The meta-analysis reported the mean difference of TAPSE value between COPD and control patients was –3.0 (95% CI, –4.31 to –1.72; P<0.001). The I2 value was high at 95%, which indicated high variance between studies within this meta-analysis. Since the P-value for the Q-statistic was 0.001, we rejected the null hypothesis that our meta-analysis would have an effect size similar to the true effect size (Fig. 2) [19–29].

Forest plot of tricuspid annular plane systolic excursion (TAPSE) in chronic obstructive pulmonary disease (COPD) patients versus control patients. CI, confidence interval.
Sensitivity analysis with one-study-removed meta-analysis showed that the effect size (mean difference of TAPSE) ranged from –3.3 to –2.5 (Fig. 3) [19–29], which was narrower than the 95% CI of the study, which indicated that there were no individual studies affecting the overall effect size. The P-value for Begg test was 0.280 but for Egger test was 0.048. This result demonstrated that there was publication bias in our meta-analysis. The funnel plot showed that there were smaller numbers of studies to the right of the plot (Fig. 4), indicating TAPSE values in COPD patients would be higher than control patients, which also confirmed the presence of publication bias.

Sensitivity analysis on tricuspid annular plane systolic excursion (TAPSE) in chronic obstructive pulmonary disease (COPD) patients versus control patients. CI, confidence interval.

Funnel plot of tricuspid annular plane systolic excursion (TAPSE) in chronic obstructive pulmonary disease patients versus control patients.
The moderator analyses, using three categorical variables that were consistently reported by all studies, showed that I2 values were high across all subgroups (Table 2). The mean difference of TAPSE values was less between COPD and control patients among studies involving inpatient settings (mean difference, –1.55; 95% CI, –2.95 to 0.76; P=0.180), than the mean difference of TAPSE values for studies in outpatient settings (mean difference, –3.6; 95% CI, –5.19 to –1.78; P=0.001), although the difference between inpatient versus outpatient TAPSE was not statistically significant (P=0.170).

Moderator analyses, using studies’ demographic information that was most consistently reported by studies’ authors
Similarly, studies involving less than 100 total patients reported a larger effect size (mean difference, –4.24; 95% CI, –6.04 to –2.45; P=0.001) than studies involving over 100 patients (mean difference, –1.70; 95% CI, –3.55 to 0.15; P=0.071). Although the differences in effect size did not reach statistical significance (between-group comparison, P=0.053), it illustrated the phenomenon where studies with smaller sample sizes tend to show a misleadingly larger mean difference.
Secondary outcome: comparison of RV free wall thickness between COPD and control patients.
Six studies reported the RV free wall thickness. The unadjusted mean RV free wall thickness for COPD patients was 4.9±1.2 mm, and for control patients was 3.4±0.7 mm (Fig. 5) [19,21,22,26–28]. Sensitivity analysis showed the range of RV free wall thickness extended from 0.54 to 0.85 (Fig. 6) [19,21,22,26–28], which was within the 95% CI of the group. As a result, no individual studies disproportionately impacted the overall effect size of this meta-analysis.

Forest plot of right ventricular wall thickness in chronic obstructive pulmonary disease (COPD) patients versus control patients. CI, confidence interval.

Sensitivity analysis on right ventricular wall thickness in chronic obstructive pulmonary disease (COPD) patients versus control patients. CI, confidence interval.
The P-value for Begg test was 0.26 but for Egger test was 0.009. A larger number of studies were positioned to the right of the funnel plot center (Fig. 7). This finding indicated that there were more studies reporting thicker RV free wall among COPD patients than among control patients. This finding also indicated that there was publication bias involving reports of RV free wall thickness between COPD and control patients.

Funnel plot of right ventricular wall thickness chronic obstructive pulmonary disease patients versus control patients.
Moderator analyses demonstrated that I2 values were consistently high among all subgroups (Table 2). The effect size (mean difference of RV free wall thickness between COPD and control patients) was larger among studies in the outpatient setting (mean difference, 1.85; 95% CI, 1.30 to 2.62; P=0.001) than among studies in the inpatient setting (mean difference, 0.81; 95% CI, –2.17 to 2.57; P=0.280). Studies with less than 100 total patients also reported a larger effect size (mean difference, 2.04; 95% CI, 1.59 to 3.24; P=0.001) than studies involving over 100 total patients (mean difference, 1.46; 95% CI, 0.58 to 2.5; P=0.002).
DISCUSSION
This meta-analysis demonstrated a statistically significant decrease in TAPSE in patients with COPD, as well as an increase in RV free wall thickness, indicating right heart dysfunction in these patients compared with control patients. TAPSE and RV free wall thickness can be measured in the ED population and may help determine severity of exacerbation and disposition.
The decrease in TAPSE values observed in this meta-analysis demonstrates the presence of right heart dysfunction in COPD patients. Our results showed a significant difference in TAPSE values between non-COPD patients and COPD patients. Therefore, although a TAPSE value <21 mm does not indicate acute right heart strain, it may be used to identify high risk COPD patients, as a previous study suggested that each mm of increase in TAPSE value was associated with a 33% reduction in the odds of a major cardiovascular event [15]. Management of COPD exacerbation varies considerably based on severity of underlying disease and response to treatment. Inclusion of TAPSE in ED decision-making may provide an objective measurement to ED physicians and admitting hospitalists to help risk stratify these patients and identify those at increased risk for morbidity and mortality. TAPSE has been used serially in patients with PH to monitor for response to treatment [30]. Adoption of routine TAPSE measurement in these patients would additionally provide a baseline for subsequent ED visits, allowing for more objective monitoring of exacerbations and progression of disease.
As evidenced in this systematic review, there is a high rate of comorbid conditions in patients with COPD. Incorporation of bedside ultrasound in the routine management of COPD patients, with inclusion of TAPSE screening, will facilitate correct identification of underlying cause of symptoms, identification of concomitant causes of shortness of breath, and allow the ED physician to identify those at high risk for hospitalization and mortality. RV dysfunction and decreased TAPSE values can also be found in other conditions such as pulmonary embolism. Therefore, understanding whether the measurement of RV free wall thickness in conjunction with TAPSE can aid clinicians in differentiating between acute and chronic disease pathologies is crucial. For instance, the presence of RV dysfunction and decreased TAPSE, coupled with increased RV free wall thickness, is more likely indicative of chronic lung disease than an acute condition like PE.
There are several limitations to this meta-analysis. There was high heterogeneity between the studies, and in the subgroups of comorbidities (PH, cardiovascular disease, and COPD exacerbations). Furthermore, the high heterogeneity and broad prediction intervals indicate that it is still unclear whether TAPSE values in COPD patients are consistently lower than in control patients. Therefore, future studies with a more well-defined patient population are needed to confirm the relationships between TAPSE values and RV free wall thickness. The studies chosen also did not consistently report common study demographics, thus preventing us from performing more thorough moderator analyses. Due to publication bias, it is also possible that studies with COPD patients having normal TAPSE and normal RV measures were not reported.
In conclusion, COPD patients had lower TAPSE values with increased RV free wall thickness. Understanding these measures in relation to individual concomitant comorbidities and changes in values based on acute versus chronic COPD disease are useful next steps to better utilizing limited echocardiography in the ED.
Notes
Author contributions
Conceptualization: QKT, AP; Data curation: MG, QKT, MH, AP; Formal analysis: QKT; Investigation: MG, MH, AP; Methodology: QKT, MH, AP; Project administration: AP; Supervision: JA; AP; Writing–original draft: all authors; Writing–review & editing: all authors. All authors read and approved the final manuscript.
Conflicts of interest
The authors have no conflicts of interest to declare.
Funding
The authors received no financial support for this study.
Data availability
Data analyzed in this study are available from the corresponding author upon reasonable request.
Supplementary materials
Supplementary Material 1.
Search strategy.
Supplementary Table 1.
Newcastle-Ottawa Quality Assessment Scale for cohort studies
Supplementary materials are available from https://doi.org/10.15441/ceem.24.228.
References
Article information Continued
Notes
Capsule Summary
What is already known
Tricuspid annular plane systolic excursion (TAPSE), and pulmonary artery systolic pressure (PASP) have been used conventionally to assess for right heart dysfunction secondary to pulmonary hypertension. A decreased TAPSE/PASP ratio has been shown to correlate with right ventricular (RV)-arterial uncoupling, which occurs when RV contraction cannot overcome RV afterload in advanced pulmonary hypertension.
What is new in the current study
Chronic obstructive pulmonary disease (COPD) patients had lower TAPSE values with increased RV free wall thickness. Understanding these measures in relation to individual concomitant comorbidities, their changes based on acute versus chronic COPD disease, are next steps to better utilizing limited echocardiography in the emergency department.