I was nineteen when I held a human heart for the first time.

It was the second semester of medical school, and we had just begun our first class on dissection. The lecturer placed it into my double-gloved hands without ceremony, as though it were just another part of the lesson. It was firmer than I expected, denser, grey in a way that felt almost muted, and heavier than I had imagined. Around me, other students kept writing in their notebooks, pens moving across paper as if nothing remarkable had just occurred.

I stood still.

My paralysis was not squeamishness or fear. Looking back, I think it was something closer to confusion. Maybe even disappointment. I had grown up, as most of us do, hearing the heart invoked in a way that had nothing to do with anatomy. People spoke of broken hearts, of brave hearts, and of hearts of stone. Movies depicted how lovers offered their hearts freely while the dying clutched at theirs. Now I held one in my hands, and it was none of those things. It was muscle. A glorified pump. It was, as I was being told by the lecturer, a plumbing problem.

This difference between the heart we know through pop culture and the heart we encounter in medicine is one I have been thinking about ever since.

Medical historians have noted that the symbolism of the heart long predates cardiology. Aristotle considered it the seat of the soul and the origin of sensation. Ancient Egyptians preserved it carefully during mummification, believing the heart would be weighed against a feather in the afterlife. Medieval European physicians spoke of the heart as the source of vital spirits. In many indigenous cultures across the world, the heart remains a spiritual and moral centre. These traditions are attempts to account for the significance of an organ that beats from before birth until death.

William Harvey was the first to “prove” the cyclic nature of circulatory system in 1628. At the time, it was one of the great achievements of Western science, but it was also a kind of dispossession. To demonstrate that all the heart does is circulate blood was to claim the organ for medicine and to evict everything else. But the metaphors did not go away, they went deeper, into poetry and popular speech, where they persist today with a strength no physiology textbook can take away from.

Consider the language of cardiac diagnosis. We speak of “heart failure”, which is now a phrase so common it is familiar to healthy patients. To an anxious patient hearing it for the first time, the word “failure” is rarely neutral. It brings connotations of self-inadequacy and of a body that has given up. I distinctly remember an older female patient from my general medicine placement who told me her “heart has stopped trying”. Through the lens of a culture that treats the heart as a measure of character, this feeling of personal failure is the natural consequence of biomedical labels. When we say, “your heart is failing”, we are talking about more than physiology, whether we intend to or not.

I reflected on this during another patient interaction, sitting in on a consultant counsel a middle-aged man newly diagnosed with dilated cardiomyopathy. When the consultant left the room, the man turned to his wife and said, quietly, “I always thought I had a strong heart. I've never backed down from anything in my life”. Now, he understood that a weak heart muscle and a lack of personal courage were not the same thing, but understanding something intellectually does not neutralise it emotionally. The metaphor had reached him before the medicine did.

The medical humanities have long argued that narrative matters in clinical care. Rita Charon, who developed the field of narrative medicine at Columbia, has written that “the effective practice of medicine requires narrative competence”, which is the ability to recognise, absorb, and respond to the stories patients bring. Cardiology, perhaps more than any other specialty, inherits this burden because of the weight of every metaphor, song, and poem that makes the heart stand for something more than itself.

There is another dimension to this that I find equally compelling, and less commonly discussed: the heart's role in marking time. Unlike most organs, the heart announces itself continuously. We feel it in exertion, fear, anticipation, and rest. We measure life by its beats, and we declare death by its cessation. No other organ has this quality of self-advertisement. The liver performs its ten thousand functions in silence, and the kidneys filter without fanfare. But the heart will not be ignored. It pounds. It skips. It sinks. And because it is always present, it becomes the organ most available for the projection of inner life.

From William Shakespeare to Carol Ann Duffy, poets have long used the heart as a metaphor for love and its effects on the body. More recently, research in psychocardiology has found a clear link between emotional states and cardiac function. For example, bereavement is associated with an increased risk of myocardial infarction, and loneliness has been linked to higher cardiovascular mortality rates. For clinicians, these findings serve as a reminder that the symbolic and the physiological are not entirely separate.

Medicine has been slow to reckon with this, in part because we are trained to translate a patient’s language and experience into clinical data. We learn to hear someone say, “my heart doesn’t feel right,” and diagnose them with Mobitz II. That act of translation is essential for diagnosis and treatment, but it also comes at a cost – the patient’s lived experience.

I do not think the solution is to abandon clinical precision. The man with dilated cardiomyopathy needs to take his quadruple therapy. Metaphor will not do that work. However, precision and attentiveness are not mutually exclusive. We can hold the heart in our hands and acknowledge that for as long as humans have been human, the heart has been asked to bear so much more.

Perhaps the task of today’s physician is not to resolve this duality, but to hold it. To know, as the cardiologist must, which ECG leads correspond to which coronary arteries, but to also understand that when a patient says her heart is broken, she is telling the truth in a way the echocardiogram does not pick up.

The heart I held that morning in anatomy was not broken or brave or full of love. It was beautiful in a different way: a compact, elegant machine, adapted by four hundred million years of evolution to move blood through the body without stopping. That beauty is real. It is not diminished by being biochemical. But it is also not the only thing the heart is, or has been, or will ever be asked to mean.

I put it down carefully and went back to taking notes.