FFRct vs Steth IO
Similar category, different focus. These tools serve overlapping but distinct needs.
Comparability 65/100
Comparability is an AI-graded 0–100 score of how directly these two tools compete — higher means a more apples-to-apples comparison.
AI Verdict
Tool A (FFRct) is an advanced diagnostic imaging analysis tool that uses AI to create 3D models from CCTA scans for coronary artery disease assessment. Tool B (Steth IO) is a smartphone-powered digital stethoscope for real-time auscultation, recording, and sharing of heart and lung sounds, primarily focused on telemedicine and remote patient monitoring. While both operate in cardiology and leverage AI, they serve distinct purposes: FFRct provides deep diagnostic insights from imaging, whereas Steth IO facilitates remote physical examination and data capture.
Reviewed by Pouyan Golshani, MD — Interventional Radiologist
Frequently Asked Questions
HeartFlow FFRct Analysis is a non-invasive AI-powered diagnostic tool that creates personalized 3D models of coronary arteries from CCTA scans to assess blood flow and aid in diagnosing coronary artery disease (CAD). It helps physicians determine the physiological significance of lesions and guides treatment strategies, including revascularization decisions. Steth IO by STRATOSCIENTIFIC is an FDA-cleared smartphone stethoscope that transforms a mobile device into a diagnostic aid, enabling healthcare providers to hear, visualize, record, and share heart and lung sounds in real-time. It enhances diagnostic accuracy and facilitates advanced telemedicine and remote patient monitoring for comprehensive patient care.
FFRct utilizes advanced artificial intelligence and computational fluid dynamics (CFD) to build a personalized, digital 3D model of a patient's coronary arteries based on CCTA image data. This technology simulates blood flow to identify areas of narrowing and assess their impact on coronary blood flow. Steth IO functions as a smartphone-powered stethoscope hardware and app that captures heart and lung sounds, converting them into a real-time visualization like a phonocardiogram or spectrogram. It also includes digital filters for sound enhancement and ambient noise attenuation.
FFRct has a CMS payment rate of $1,017 for FFRct Analysis in 2025, with commercial payer rates varying. As of January 1, 2024, FFRct was transitioned to a Category I CPT code (75580), which provides payment to physicians for the service. Steth IO offers customized pricing for providers and clinics, with an annual membership for Steth IO Spot available at $15/month, which includes one exam per month and the first three months free with a device purchase. Remote Physiological Monitoring (RPM) functionality can be added for $25 per patient per month, and it supports billable, continual remote monitoring.
FFRct is primarily designed for Cardiology and Radiology specialties. It aids clinicians in determining the physiologic impact of coronary artery disease in patients with chest pain or other symptoms suggestive of CAD. Steth IO is relevant for Cardiology, Internal Medicine, and Pulmonology. It has wide potential application in primary care settings for routine cardiovascular and respiratory examination.
FFRct provides non-invasive diagnostic analysis of coronary arteries by generating personalized 3D digital models and analyzing blood flow to identify areas of narrowing (FFRct values), aiding in diagnosing CAD and guiding revascularization decisions. It offers a physiological dimension to anatomical CCTA information. Steth IO offers real-time visualization of heart and lung sounds (phonocardiogram/spectrogram), recording and saving patient exams, and sharing capabilities with specialists. It functions as a diagnostic aid to help healthcare providers identify abnormalities in collected sounds and supports telemedicine and remote patient monitoring.