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Market Segments

Cardiac Rhythm Management(CRM)

In one line

Implantable and external devices that monitor and treat cardiac arrhythmias — pacemakers, ICDs, CRT devices, and insertable cardiac monitors.

Definition

Cardiac Rhythm Management (CRM) is the MedTech segment that develops devices for diagnosing and treating bradyarrhythmias, tachyarrhythmias, and heart failure conduction disorders. The category covers permanent pacemakers (single, dual, leadless), implantable cardioverter defibrillators (ICDs), cardiac resynchronization therapy (CRT-P, CRT-D), insertable cardiac monitors (ICMs), and the leads, programmers, and remote-monitoring infrastructure that surround them. CRM devices are almost exclusively Class III in the US (PMA pathway) because they support or sustain life, and almost all modern CRM systems include wireless telemetry that places them squarely under FDA's Section 524B cyber device authority.

Why it matters

CRM is one of the highest-revenue MedTech segments and a leading source of post-market cybersecurity advisories (Medtronic CareLink/Conexus, St. Jude Merlin@home). Market dynamics are shaped by leadless pacing, extravascular ICDs, conduction-system pacing, and remote-monitoring reimbursement (CPT 93294-93298).

Common pitfalls

•Treating CRM telemetry links as a closed system — they are cyber-device interfaces under 524B.
•Underestimating the regulatory burden of lead changes, which often require a PMA supplement.
•Ignoring remote-monitoring reimbursement codes that materially shape product economics.

Sources

FDA — Pacemakers · FDA
ISO 14708-2 Active implantable medical devices — Pacemakers · ISO
Heart Rhythm Society Remote Monitoring Consensus · HRS

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Why compare MedTech terms side by side?

MedTech terminology is full of pairs that look interchangeable but carry very different regulatory, clinical, and commercial consequences. Picking the wrong framework, pathway, or standard early in a project can add months to a submission, invalidate clinical evidence, or trigger an audit finding. Side-by-side comparison is the fastest way to surface those differences before they become costly mistakes.

Each comparison on this page pulls from the same vendor-neutral, sourced definitions used throughout the MedTech Terms glossary. You see the one-line summary, the formal definition, why it matters in practice, common pitfalls, and the primary sources (FDA guidance, EU MDR/IVDR articles, ISO/IEC standards, MDCG documents, IMDRF principles) that back each entry. That makes the comparison defensible in regulatory strategy memos, design reviews, and submission narratives.

Common comparison patterns

Regulatory pathway choice - 510(k) vs PMA, 510(k) vs De Novo, Abbreviated vs Special 510(k).
Quality systems - QSR vs ISO 13485, QMSR vs QSR.
Software classification - SaMD vs SiMD, Locked vs adaptive AI.
EU frameworks - MDR vs IVDR, CE Mark vs UKCA.
Cybersecurity artifacts - SPDX vs CycloneDX SBOM, CVE vs CVSS.
Post-market actions - Recall vs field action, Removal vs correction.

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MedTech Terms is a vendor-neutral community resource sponsored by Blue Goat Cyber. Definitions are written for educational use and are not legal or regulatory advice.