Exams
Ambulatory blood pressure monitoring records your blood pressure across a full day with a cuff on the arm
What does the Ministry of Health say about this exam?
Minsal's clinical practice guideline for primary hypertension is direct: in people with suspected hypertension it suggests 24-hour ambulatory blood pressure monitoring (MAPA) over a blood pressure profile. The same guideline notes the devices must be arm cuffs and must be calibrated.
In its follow-up section the document itself writes MAPA (Holter de presión arterial). The synonym the country uses reached the official text and stopped being corridor jargon.
What does the centre's catalogue call it?
Something different again. In Fonasa's 2026 MLE fee schedule the service reads monitoreo de presión arterial continuo, code 17-01-009. The word Holter does not appear on that line. It appears on 17-01-006, which is the rhythm one.
Fonasa code for ambulatory blood pressure monitoring
17-01-009
The doctor writes Holter de presión, the fee schedule says something else, and the scheduling search finds the wrong Holter. That is the full journey of an exam order ending up in the wrong room.
How do I tell from the order which Holter it is?
| Signal on the order | Blood pressure monitor | Rhythm monitor |
|---|---|---|
| Words that appear | MAPA, presión arterial, mmHg, hypertension | Ritmo, arrhythmia, palpitations, ECG, syncope |
| What gets fitted | A cuff on the arm and a recorder on the belt | Electrodes on the chest and a recorder |
| What it records | Blood pressure readings at intervals | A continuous electrocardiogram, covered in the Holter monitor guide |
What do you need for the day of the exam?
- A short visit to fit the device and another to return it. Two separate trips to the centre on different days.
- Clothing that lets you roll a sleeve up without undressing. A wide sleeve helps more than you would think.
- An ordinary day. The exam measures your normal life, so the best day is a typical one.
- The log sheet if the centre gives you one, to note sleep or medication times.
Why does this order fall through?
A physical constraint: the device. A centre owns few units, each one goes out for a whole day and comes back for cleaning and download. When somebody does not show, the unit sits idle for a full day and no overbooking rescues it. A no-show here costs more than one in a consultation.
The second reason is the name. The patient turns up for the wrong Holter, and that confusion burns two days of equipment: the one lost and the one that has to be found again.
What should I do if I am holding one?
- Look for the words presión, MAPA or arterial on the order. If they are there, this is the exam.
- When you call, say monitoreo ambulatorio de presión arterial as well as Holter de presión. One of the two names will match the catalogue.
- Book the fitting and the return in the same call.
- Pick an ordinary working or routine day, not a holiday and not a travel day.
- Give notice the moment you know you cannot make it. The device can be reassigned if there is time.
Having the centre confirm the fitting, remind you about the return and tell you which of the two Holters is yours already works. Ask at your health centre whether they work with Surface.