ECG results don’t come with drama. They come with numbers, intervals, and the quiet truth of what your heart is doing when you’re not thinking about it. As I move deeper into what I call Chapter Four of my medical story — living with liver-only metastases and preparing for systemic therapy — every data point matters. Bloodwork, scans, physical performance, recovery patterns, and now, the electrical map of my heartbeat.
My December 2 ECG didn’t reveal a crisis. It showed a pattern. Across three tracings, the interpretation was the same: sinus bradycardia, otherwise normal ECG. For many people, that phrase might sound unsettling. For me, it was reassurance that the heart I walk Toronto with every morning is still doing its job quietly and efficiently.
What My ECG Actually Showed
The numbers were consistent across all three ECG strips:
- Heart rate: 58–60 beats per minute
- PR interval: 146–154 ms
- QRS duration: 90 ms
- QT interval: 428–438 ms
- QTc (corrected): 420–438 ms
- Interpretation: Normal ECG aside from sinus bradycardia
These are the values cardiologists look at when assessing electrical stability. A normal QRS means clean conduction. A steady PR interval means the atria and ventricles are communicating properly. A safe QTc — especially important before chemotherapy or clinical trial enrollment — means the heart is not at risk for dangerous rhythm changes.
My QTc fell well within safe ranges.
My conduction was smooth.
My rhythm was slow, but not abnormal.
This is the cardiovascular profile of someone conditioned, not compromised.
What Sinus Bradycardia Means for Me
Sinus bradycardia simply means a resting heart rate below 60 beats per minute. In cardiology, the meaning depends on the person. For someone sedentary, it could suggest a problem. For someone who walks 15,000 to 30,000 steps a day, trains regularly, fasts daily, and maintains a low resting blood pressure, bradycardia is common — even expected.
This is not a slowdown caused by illness. It is a signature of conditioning.
A heart that doesn’t panic.
A heart that doesn’t need speed to stay effective.
A heart that’s been trained to work efficiently under stress, fasting, and endurance.
In the context of cancer treatment, that matters. A strong cardiovascular profile increases the margin of safety for chemotherapy, clinical trials, and supportive medications. It tells oncologists that the body can withstand what comes next.
Why ECG Results Matter During Cancer Treatment
Before entering a trial or starting a chemotherapy regimen such as FOLFIRI or Bevacizumab, the heart must be assessed for stability. Certain treatments can prolong the QT interval or increase arrhythmia risk. An ECG becomes a gatekeeper.
Mine said:
- No arrhythmia.
- No ischemia.
- No conduction delays.
- No red flags for treatment.
The phrase “otherwise normal ECG” is not a footnote. It is confirmation that, despite everything happening in the liver, my heart’s electrical system remains steady.
How This Fits Into Chapter Four
Cancer is not just about tumours — it is about terrain. It is about what parts of you remain strong enough to fight. In Chapter Four, liver-only metastases define the battlefield, but my physical conditioning defines my capacity.
The ECG results are part of that story. A heart rate of 58 is not fragility. It is preparedness. A QTc of 420 ms is not a warning. It is clearance to continue. The numbers are not emotional, but the meaning behind them is grounded in reality: my body is still strong enough to move, train, fast, walk, and endure.
The Quiet Reassurance of a Normal ECG
There is something grounding about seeing your heartbeat turned into a series of numbers and lines. Not because they promise perfection, but because they reveal stability. The ECG confirmed that the war in my liver has not echoed into my chest. My heart is steady. My rhythm is clean. My capacity remains intact.
In its own quiet way, the ECG said what I needed to hear:
I can keep moving forward.
I can keep going.
And for now, that is enough.