cpet-analysis

CardiometR 的 CPET 领域专业知识。适用于实现 CPET 分析功能、阈值检测、峰值判定、数据校验，或各类生理学计算。内置 ATS/ACCP 指南与参考值。

SKILL.md

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name: cpet-analysis
description: CPET domain knowledge for cardiometR. Use when implementing CPET analysis functions, threshold detection, peak determination, data validation, or any physiological calculations. Includes ATS/ACCP guidelines and reference values.
allowed-tools: Read, Write, Edit, Glob

CPET Analysis Domain Knowledge

When to Use This Skill

•Implementing CPET data processing algorithms
•Detecting ventilatory thresholds (VT1/VT2)
•Determining peak/max values with appropriate averaging
•Validating physiological plausibility of data
•Implementing quality control checks
•Understanding CPET variables and their relationships

Key CPET Variables

Variable	Units	Description
VO2	mL/min	Oxygen consumption
VO2/kg	mL/kg/min	Weight-relative VO2
VCO2	mL/min	Carbon dioxide production
VE	L/min	Minute ventilation
RER	ratio	Respiratory exchange ratio (VCO2/VO2)
HR	bpm	Heart rate
VE/VO2	ratio	Ventilatory equivalent for O2
VE/VCO2	ratio	Ventilatory equivalent for CO2
PETO2	mmHg	End-tidal O2 partial pressure
PETCO2	mmHg	End-tidal CO2 partial pressure
BF	breaths/min	Breathing frequency
VT	L	Tidal volume

Reference Guidelines

See CPET-GUIDELINES.md for detailed information on:

•ATS/ACCP Statement guidelines
•Physiological reference ranges
•Threshold detection methods
•Peak value determination protocols
•Data quality criteria

Quick Reference: Physiological Ranges

Resting Values

•VO2: 3.5 mL/kg/min (approximately 250 mL/min for 70kg person)
•RER: 0.70-0.90
•HR: 60-100 bpm
•VE: 6-8 L/min

Maximal Exercise

•Peak RER: > 1.10 (indicates maximal effort)
•Peak HR: ~220 - age (± 10-15 bpm)
•Peak VE: can exceed 150 L/min in athletes

Threshold Detection

•VT1 (aerobic threshold): typically 50-60% VO2max
•VT2 (respiratory compensation): typically 70-80% VO2max

Files in cardiometR

•R/process.R - Peak determination, stage extraction
•R/methods-validate.R - Data quality validation
•R/methods-thresholds.R - Threshold detection algorithms