Electrocardiograph and Holter monitor: how to choose ECG equipment for a clinic
3 November 2026
An electrocardiograph and a Holter monitor record the same electrical activity of the heart, but they answer different questions. A resting ECG machine captures 12 leads in about 10 seconds while the patient lies on the couch. A Holter ECG is worn for a day or longer, so it catches rhythm problems that may simply not show up during a clinic visit. Below we go through what to check in the specification of both devices so the machine actually fits your functional diagnostics room, emergency department or outpatient clinic.
How is an electrocardiograph different from a Holter monitor?
The difference is built into the standards. Safety and essential performance of electrocardiographs that produce a diagnostic report are covered by IEC 60601-2-25:2011. Holter systems that record and analyse the ECG continuously have their own standard, IEC 60601-2-47:2012. Cardiac monitors used in intensive care fall under a third document, IEC 60601-2-27, which is why a patient monitor doesn't replace a full diagnostic ECG even though it also shows a trace.
In practice these are three different jobs. An electrocardiograph gives a diagnostic 12-lead ECG within a few minutes of an appointment. A Holter records 2, 3 or 12 channels for 24 to 48 hours, and newer recorders go longer. Meanwhile the patient goes about a normal day and marks symptoms with a button on the device or in a diary. A patient monitor watches the rhythm at the bedside and raises alarms; we have a separate article on those.
How many channels does an electrocardiograph need?
This is where people most often get confused. The channel count in a model name usually means how many traces it prints side by side on one strip, not how many leads it acquires. The Edan SE-3 is called a 3-channel unit, yet it records all 12 leads at once and prints them in groups of three on 80 mm paper. The Edan SE-601B puts three or six traces side by side on 110 mm paper. The Edan SE-1200 Express prints the report straight onto A4.
Paper width decides what the report looks like in the patient's file. Fukuda Denshi's CardiMax range shows this best: the FCP-8100 and FX-8200 share the same 225 × 180 × 50 mm housing and weigh 1.2 kg, but the first prints 1 or 3 channels on 63 mm paper and the second 6 or 12 channels on 110 mm. So the FX-8200 fits a full 12-channel ECG on one strip, which is handy for comparing with an earlier recording.
If you store reports digitally and rarely print, printer width matters less than export formats. More on those below.
Which technical parameters should you check in the specification?
In 2007 the American Heart Association, together with the ACCF and HRS, published recommendations on ECG standardisation. They're still the main reference point for engineering requirements. A few figures from that document are worth checking against the device's data sheet:
- The high-frequency cutoff for a standard 12-lead ECG should be at least 150 Hz, and 250 Hz for children. A 40 Hz filter removes noise but makes amplitude measurements unusable for diagnostic statements, so the machine should warn when such a filter is on and restore the proper one after the recording.
- A sampling rate of at least 500 samples per second. That's what allows a 150 Hz digital filter with amplitude error of up to 1% in adults.
- A low-frequency cutoff of 0.05 Hz, relaxed to 0.67 Hz for linear digital filters without phase distortion. It affects how faithfully the machine shows the ST segment level.
Current models have headroom. The Edan SE-1200 Express has a 24-bit ADC at 64,000 Hz and a 0.01 to 500 Hz bandwidth. The patient cable of the Philips PageWriter TC10 takes 8,000 samples per second from each electrode. If the specification doesn't list such figures, ask the supplier for them in writing.
Why does the machine need interpretation and networking?
An interpretation algorithm saves the physician time, but it doesn't sign the report for them. The same recommendations state plainly that a computer-interpreted ECG has to be overread and confirmed by a physician. The algorithm earns its keep where minutes count. The 2023 European Society of Cardiology guidelines on acute coronary syndromes call for an ECG immediately at first medical contact, interpreted within 10 minutes.
That's why emergency and cardiology departments choose machines with extended algorithms. Philips DXL in the PageWriter TC70 offers more than 600 interpretive statements and takes right-sided and posterior chest leads into account. The Fukuda Denshi FX-8300 and FX-8400 can optionally synthesise 18 leads and include an ACS assessment system. The Edan SE-1200 Express uses the Glasgow interpretation algorithm.
The second quiet problem with ECGs sits outside the algorithm. Electrodes get placed inaccurately or leads get swapped. According to the AHA recommendations, a common error is placing V1 and V2 one or two intercostal spaces too high, which can produce a picture resembling an anterior infarction. Philips LeadCheck recognises twenty typical cases of swapped electrodes, while the Edan SE-3 and Fukuda Denshi FX-8322 alert you when an electrode comes off.
Networking keeps the ECG from living only on paper. Check what the machine can send to your hospital information system: PDF and XML, DICOM, HL7, GDT, and a DICOM Worklist so patient details aren't typed in by hand. The Edan SE-1200 Express and SE-601B have this, and the Philips PageWriter TC30 has LAN with optional Wi-Fi.
Holter ECG: how many channels and how many days of recording?
The 2017 ISHNE-HRS expert consensus on ambulatory ECG monitoring recommends choosing the duration by how often symptoms occur. A standard 24 to 48 hour Holter suits patients who have palpitations every day. Rarer episodes need 3 to 7 days of continuous recording, and if that isn't enough, clinicians move on to loop recorders worn for weeks. The same document notes that ideally a Holter would record 12 leads, but most devices record 2 or 3 channels.
You can see this in the BTL models in our catalogue. The BTL-08 Holter H100 system with a 3-channel recorder is designed for a classic 1 to 2 day recording. The H300 records 3 or 7 channels for anywhere from a day to a week and transfers data wirelessly. Both recorders weigh 106 g, have a separate pacemaker pulse detection circuit and a microphone for voice event marks. The Italian Progetti PG 8 Plus runs on a single AAA battery and stores the recording on a removable SD card, so between patients you only swap the battery and the card.
Pay more attention to the analysis software than to the recorder. A Holter produces tens of thousands of complexes a day, and the physician works in the software: complex templates, rhythm analysis, ST, QT, heart rate variability. Ask to see a report from a real recording before you buy.
Portable or stationary ECG machine?
For a rural health post, a private practice or home visits, a light portable electrocardiograph with a battery is the right fit. The Fukuda Denshi FCP-8100 weighs 1.2 kg. The Edan SE-3 weighs about 2 kg and runs up to 6.5 hours on its battery. The Philips PageWriter TC10 weighs 2.5 kg with the battery and has a carry handle.
In a department that records dozens of ECGs a day, a cart-mounted machine with a large screen and keyboard is easier. One example is the Philips PageWriter TC30, whose patient module mirrors the electrode positions on the body. If the same room also runs exercise tests, look at the Fukuda Denshi FX-8400: you can add the FP-811S stress test software and one machine covers both types of study.
The equipment list for a room is set by the equipment standard (tabel osnashchennia) for your level of care in Ukraine. We explain how to put one together in our article on equipment standards.
What to prepare before talking to a supplier?
To get comparable offers rather than three different price lists, write down your requirements in advance:
- Who your patients are: adults only or children too (this decides the 250 Hz cutoff and paediatric analysis).
- How many ECGs a day and where: a single room, wards, home visits. That tells you how much weight, battery life and a cart matter.
- How you store results: paper, PDF or a hospital information system. List the formats and protocols you need (DICOM, HL7, GDT).
- For Holter: how many recorders per analysis software licence, how many channels and the longest recording time.
- Consumables: paper width and type, electrodes, batteries.
Finer's diagnostic equipment catalogue includes the Philips PageWriter TC30, Edan SE-1200 Express, Fukuda Denshi FX-8200 and BTL-08 Holter H300, along with other electrocardiographs and Holter monitors. We'll match a model to your requirements and prepare a quotation. Call 0 800 334 585 or get in touch via our contacts page. If the functional diagnostics room is part of a new department, turnkey equipment is the easier route.
FAQ
1. How long do you wear a Holter monitor?
A standard recording lasts 24 to 48 hours. According to the 2017 ISHNE-HRS consensus, that kind of Holter suits patients whose symptoms appear every day. For rarer episodes, continuous recording runs 3 to 7 days, and after that clinicians switch to loop recorders that patients wear for weeks.
2. How many channels does a Holter monitor have?
Most recorders capture 2 or 3 channels, fewer capture 12. The BTL-08 Holter H100 and Progetti PG 8 Plus have 3 channels, while the BTL-08 Holter H300 records 3 or 7. The ISHNE-HRS consensus notes that artifacts are easier to recognise when several channels are recorded at the same time.
3. What is the difference between a Holter and an ECG?
A standard resting ECG records 12 leads for about 10 seconds in the clinic. A Holter records the ECG continuously for a day or several days while the patient goes about normal life, so it catches brief and irregular rhythm disturbances. The two devices are covered by different standards, IEC 60601-2-25 and IEC 60601-2-47.
4. Does a Holter monitor measure blood pressure?
A Holter ECG records only the electrocardiogram; it doesn't measure blood pressure. Twenty-four-hour blood pressure monitoring uses separate devices with a cuff, which people also loosely call a "BP Holter". Check the specification to see exactly what a given device records.
5. Can an ECG be wrong?
Yes, most often because of how it was recorded. Misplaced electrodes, swapped leads or a 40 Hz filter distort the trace. That's why the AHA recommendations require a physician to overread and confirm the computer interpretation, and current machines warn about swapped or detached electrodes.
