What is the clinical evidence from this study?

Study design: Observational. Population: Cancer survivors with suspected autonomic dysfunction (n=24). Intervention: Cancer survivorship and treatments (chemotherapy/radiation). Primary outcome: Presence of autonomic impairment on autonomic reflex testing.

What does this research mean for the field?

Cancer survivors presenting with symptoms of dysautonomia frequently demonstrate objective cardiovascular autonomic impairment on reflex testing, with dysfunction predominantly involving the sympathetic system. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To characterize the clinical features, patterns, and severity of cardiovascular autonomic dysfunction in cancer survivors.

August 4, 2026Cardio-OncologyOpen Access

Quantitative assessment of cardiovascular autonomic impairment in cancer survivors: a single center case series

View Full Paper

Ask AI

Bookmark

Key result

Autonomic reflex testing confirms objective impairment in ~92% of referred cancer survivors, predominantly sympathetic.

n=24

Why the study?

Cardiovascular autonomic dysfunction in cancer survivors is poorly understood, prompting an effort to better characterize its clinical features and subtypes.

Population

24 cancer survivors referred for suspected autonomic dysfunction

Design

Single-center retrospective case series

Authors

BNBenjamin NoorUCLA Medical Center SAShannel AkhavanTel Aviv University MLMichael K. LeuchterUniversity of California, Los Angeles

Discussion

Member takes

Implication

Supports autonomic testing in symptomatic cancer survivors; hypothesis-generating for prevalence and management in broader populations.

Key Points

To characterize the clinical features, patterns, and severity of cardiovascular autonomic dysfunction in cancer survivors.
Retrospective single-center case series of 24 cancer survivors referred for suspected autonomic dysfunction in an academic cardio-oncology program.
Patients underwent autonomic reflex testing evaluating adrenergic, cardiovagal, and sudomotor function, scored via the Composite Autonomic Severity Score (CASS).
Autonomic impairment was confirmed in 22 of 24 patients (92%), with a mean CASS of 3.6 ± 2.6; 11 had mild, 7 moderate, and 4 severe impairment.
Orthostatic hypotension occurred in 50% (n = 12), inappropriate sinus tachycardia in 20.8% (n = 5), and postural orthostatic tachycardia syndrome in 12.5% (n = 3).
Impairment spanned both parasympathetic and sympathetic branches, with adrenergic dysfunction being the most pronounced, and most patients reported subjective symptom improvement following pharmacologic therapy.

Study Design

Type

Observational (n=24)

Multicenter

Structured PICO

Population

24 adult cancer survivors (mean age 51.3 years, 33.3% female) referred for suspected autonomic dysfunction underwent autonomic reflex testing an average of 10.3 years after cancer diagnosis.

Exposure

Autonomic reflex testing (heart rate deep breathing test, Valsalva maneuver, tilt-table test, and sudomotor testing) and personalized pharmacologic treatments (ivabradine, metoprolol, midodrine, steroids).

Outcome

Characterization and quantification of the type and severity of cardiovascular autonomic dysfunction using the Composite Autonomic Severity Score (CASS).surrogate

Cardiovascular autonomic dysfunction is highly prevalent among symptomatic cancer survivors and commonly affects both sympathetic and parasympathetic systems, suggesting a need for clinical screening and targeted treatment.

Limitations

Retrospective, descriptive case series without a control group or statistical hypothesis testing
Small sample size
Selection bias as only symptomatic patients were referred for autonomic reflex testing
Referral bias due to institutional variations in malignancies managed and treatment regimens used
Difficulty identifying individual associations due to multi-drug regimens
Lack of standardization in personalized autonomic treatments
Retrospective, descriptive case series
Lack of control groups
Selection bias (only symptomatic patients referred)
Referral bias
Multi-drug regimens making individual associations difficult
Lack of standardization in treatment

Cite This Study

Noor et al. (2020) conducted an observational in Cancer survivors with suspected autonomic dysfunction (n=24). Cancer survivorship and treatments (chemotherapy/radiation) was evaluated on Presence of autonomic impairment on autonomic reflex testing. Among 24 cancer survivors referred for suspected autonomic dysfunction, 22 (92%) demonstrated objective autonomic impairment on reflex testing, with dysfunction most pronounced in the sympathetic system.

synapsesocial.com/papers/6a7164f9fe4101aa97e08e98 https://doi.org/10.1186/s40959-020-00065-9

View Full Paper

Ask AI

Bookmark

Quantitative assessment of cardiovascular autonomic impairment in cancer survivors: a single center case series

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

Quantitative assessment of cardiovascular autonomic impairment in cancer survivors: a single center case series

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

Also Consider

Also Consider