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When Every Second Counts: The Clinical Value of ECG Testing in Primary Care

Dr. Tom Schwieterman, Vice President, Clinical Affairs + Chief Medical Officer, Midmark

By: Dr. Tom Schwieterman
Vice President, Clinical Affairs + Chief Medical, Midmark

March 23, 2026

 

Rethinking the Front Lines: Why Primary Care Shouldn’t Wait for Cardiology

Cardiovascular disease remains the leading cause of death in the US, with one person dying every 33 seconds from a cardiac event [CDC - Heart Disease Facts]. Many of these deaths are preventable with earlier detection and intervention—but often, by the time a cardiologist sees the patient, the window has closed.

Primary care providers are uniquely positioned to detect subtle cardiac abnormalities before they develop into clinically significant health issues However, the underutilization of ECG testing in this setting can delay early diagnosis and result in preventable downstream cardiac disorders.

ECG: A Low-Barrier Tool with High Clinical Yield

Electrocardiography (ECG or EKG) is one of the most accessible, non-invasive diagnostic tools in clinical medicine. When incorporated routinely at the primary care level, it can:

  • Reveal early signs of arrhythmias, conduction abnormalities or ischemia
  • Assist in medication management, especially in patients on QT-prolonging drugs
  • Establish a baseline for high-risk patients (e.g., diabetics, hypertensives)

Too often, ECGs are reserved for patients already symptomatic. Yet many cardiac issues begin silently and the information gained in routine ECG has the potential to improve proactive care management of emerging conditions as well as reducing risk of cardiac complications when choosing therapeutic interventions.

Understanding the Gap: Why ECGs Aren’t More Widely Used

The barriers to adoption are often logistical. Common concerns that reduce a clinician’s propensity to conduct ECG testing include:

  • Lack of confidence in interpreting results
  • Workflow disruption and time required to perform the test
  • Artifacts and poor tracing quality reduce confidence in the test results
  • Limited integration with the EMR

Recent advancements in digital ECG technology address these issues:

  • Built-in digital filters reduce noise and motion artifacts for cleaner tracings [Behar et al., 2013]
  • Auto-interpretation algorithms offer baseline insights. While still requiring clinical validation, these computer-generated interpretations provide an immediate guide for the most critical findings
  • Interoperability standards like DICOM and HL7 support EMR integration and care team access as well as improve the ability to share studies without loss of resolution [Orphanidou et al., 2015]

A Familiar Story: Realizing What We Missed

Clinicians are highly trained and rely on their experience and education when reviewing any clinical test but data has a way of revealing blind spots. As one contributor noted in a BP-focused blog, “I thought I knew how to take BP—until the data proved me wrong” [Midmark - Blood Pressure Blog]. The same sentiment applies to cardiac monitoring. The details matter in lead placement, patient positioning and adhering to protocols.

We’ve trusted visual checks, pulse readings and symptom reviews to guide referral decisions, but silent arrhythmias and ischemic changes are often difficult to detect on routine exams. Without a traceable record, primary care risks missing the earliest signs of cardiac disorders. ECGs allow providers to see beyond their physical exam and hear beyond their stethoscopes when doing a heart evaluation.

The Case for Routine ECG in Risk-Based Screening

Routine ECG use in primary care is a diagnostic modality like any other, its implementation requires physician oversight on when and where it is most appropriate. But applying it to the right patient population can:

  • Identify atrial fibrillation before it leads to stroke
  • Detect subtle ischemic changes in diabetic patients who often fail to experience common signs and symptoms
  • Support safe prescribing practices for psychotropic and cardiac medications
  • Provide a means to manage patients more effectively while achieving a clinical record of documentation to engender confidence when referring

Emerging guidelines increasingly support proactive cardiovascular assessment in primary care, especially as value-based care models evolve. It has never been more important for primary care physicians to proactively identify risk in their patient populations, and ECG is a ready-made diagnostic tool to do just that.

Building Better Clinical Conversations

Incorporating ECG into the primary care workflow creates a stronger bridge to cardiology. With standards like DICOM compatibility, primary care clinicians can:

  • Share high-quality, standardized ECG data with specialists without any loss of resolution clarity for waveforms
  • Enable more efficient consults and co-management by having a codified and longitudinal care record of cardiac performance
  • Reduce redundant testing and improve diagnostic continuity [NIH: DICOM Review]

This improves both patient experience and clinical trust—supporting a true team-based approach to cardiac care.

 

 

Clinical Call to Action:

ECG in primary care is a powerful diagnostic tool that enables a care team the opportunity to intervene earlier, collaborate better and help close the cardiovascular care gap.

Start the conversation:

  • Discuss with your care team how ECG testing is (or isn’t) being used
  • Explore barriers like workflow, confidence and data quality
  • Reassess how you triage cardiac risk today—and what might be missed

See the Research:

 

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