The heart of the matter

Heart doctor Michael Henein steps back to consider the unseen and unique wonders of the human body’s design.

Michael Henein

Professor Michael Henein is a consultant cardiologist, and a Professor of Cardiology at Umea University, Sweden.

A model of a human heart on a short stand.

Photo by Jesse Orrico on Unsplash.

Shakespeare famously asked:

“What a piece of work is a man, how noble in reason, how
infinite in faculties, in form and moving how express and admirable, in action how like an angel, in apprehension how like a god! the beauty of the world, the paragon of animals—and yet, to me, what is this quintessence of dust?

Humans may be complex, capable of great heroism and deep depravity, yet it is worth stopping for a moment to look at the human body and mind to marvel in what we have become, and how we are made.

The visible design of the human body points out common features shared along with other members of the animal kingdom. Examples of these features are: two eyes, two ears, two nostrils, one mouth and four limbs, attached to a body and head. Detailed study of different seen parts of the body may, however, show some differences. For example, the presence of fingers and nails, hair distribution as well as a developed tail. While most members of the animal kingdom have teeth and a tongue, those two could also vary in their number and size, respectively, according to different species. Genetic investigations have shown that we humans share 99 % of our genes with animals, suggesting that our “earthly” component shares a common origin. Indeed, the twenty first century scientific findings match what is written in the Genesis story of creation, a story written over 3,500 years ago, well before genetic sciences came to light.

Creatures great and small

As for morphological differences between animal species, it is difficult to naively conclude why some are wild while others are man-friendly-even if the wild ones have different shapes, design, dietary habits, body size and life span. Other important observed features of the members of the animal kingdom are that they are all born, they all age, then ultimately die.

If we are to look at the unseen features of the members of the animal kingdom, we can again identify similarities. For example, all have a gastrointestinal tract, a cardiovascular system, a reproductive system, a respiratory system, a urinary system and much more. While these systems may differ slightly between species, the overall structure and function achieve similar purposes. For example, heart speed is faster in small animals like rats compared to big ones like elephants who have very slow hearts. Likewise, the respiratory system and the number of respiratory cycles per minute are significantly faster in running animals compared to the sedentary and slowly moving ones. Finally, the number of offspring also differs in different species, being just one at a time in big animals like elephants and horses, and many offspring in small animals like rabbits and mice. Such paradox between the number of offspring and animal size makes you think of the important determining role of the activity of those animals.

Unseen wonders

Now to turn to the rest of the animal kingdom and the unseen features of the human body. To start, let us look at the amazing functions of the human brain and its various functions. When humanity is sometimes described as the crown of creation, such a description is based on the superiority of human brain function and skills. Its sophisticated structure and how vital centres are created deep in the skull, to be protected from traumas, make you marvel. Also, the brain controls the different functions of the whole body, with its sensory and motor activities, various vital system functions including the lungs and the heart, all endocrine glands’ function, in addition to various receptors and centres that allow utmost precision and accuracy in everything we do. An example of this kind of precision is a doctor feeling a vein or an artery with the tip of a finger to insert a needle or a musician moving a finger a few millimetres while playing a violin, to produce the exact sound needed. Furthermore, the integrated function of human muscles, nerves and spinal cord is also amazing, let alone the synapsis between the nerve endings and muscle bundles, the chemicals secreted in them which allow electric stimulus transmission from the nervous system to achieve the motor function and desired movement.

The human brain also has the unique feature of storing knowledge. Of course, we should not ignore the importance of the training and programming ability of human brain. We learn how to drive a car, how to play games, how to study, how to operate safely on a sick patient. Such acquired skills are quite limited in other members of the animal kingdom. Moreover, the human brain has the unique ability to invent, discover, improve and correct errors it identifies.

Another very unique feature of human brain is its ability to conduct speech, a feature of humans that is under-developed in other members of the animal kingdom. While most animals can make noise and sounds, only humans can articulate words, sentences and even sing very complex songs. This unique ability seems to be the underlying mechanism behind the development of languages which are based on the human ability to talk and transmit information and knowledge by words and phrases.

The unseen brain has allowed human life to develop over time, building skills and achievements from generation to generation. Millennia ago, humans lived in huts together with animals, and now they build houses and palaces to live in. Centuries ago, we used donkeys, horses and camels to travel but now we use cars, trains, ships and airplanes. Our ancestors burned wood and coal to cook and to warm but now we use electricity to do these.

When we look carefully at the unseen parts of the human body, we also realize that we cannot alter any of it, despite the scientific advances made over the years. We can understand what harms our body and take measures to avoid it. Out of the ability of our brain to discover and invent, we have now produced science-based means for curing various diseases. Consider how we can replace a dysfunctional heart valve or a mobility-limiting joint. These inventions have resulted in a better quality of life, alleviating of symptoms, even helping to avoid early death, in some cases such as heart disease and cancer.

The heart of the matter

Another unseen source of life in humans is the heart. This fist-size organ is so complex in its structure and function. Recent scientific advances have enabled us to study heart function in milliseconds, hence the development of pacemaker treatments. They have also allowed clear imaging of the inside of the heart and the identification of pathologies, developments that guide practitioners to the optimum treatment of heart conditions. Recent discoveries have also allowed us to better understand how people develop coronary artery disease and how the pathology starts at the innermost layer of the arteries, particularly in individuals carrying significant risks for atherosclerosis including, smoking, high blood pressure, diabetes, high cholesterol and obesity. Amazingly, obesity has been shown to be the strongest underlying cause of other risk factors, hypertension, diabetes and hypercholesterolemia. So, nature cannot be blamed in many of these patients but our own patterns of behaviour. Science has shown that walking at least 5,000 steps each day, complying with the design of our body, reduces the likelihood of developing coronary artery disease by 15 per cent.

The unseen physiology of the rest of our body systems and the interaction between systems make us wonder how we are made. A rise of our body temperature by one degree due to a bug infection affects all body systems from the brain to the heart. A virus which cannot be seen by the most powerful microscope can destroy our lungs and cause premature death, as was the case with COVID-19 and others.

Finally, human inventions in the form of powerful microscopes have allowed scientists to study the human cell, which is the smallest living component of our body. Such small cells cannot be replicated in any factory in the twenty-first century, despite the vast scientific developments that surround us. You'll be surprised to learn how complicated and meticulously fine-tuned a human cell is and also how it functions, connects with other cells and other parts of the body. An example of this is the interaction between body minerals, calcium, sodium and potassium with heart and muscle individual cells. Such a function is critically controlled by many factors such as time, electric stimulation and pressure differences producing remarkably harmonious contractions and relaxation of the muscles without missing a beat.

Article

Assisted dying

Comment

Mental Health

2 December 2024

6 min read

No, it is not your life to dispose of

What could not be said about the assisted dying debate

Steve Hellyer

Steve is the former vicar of St Matthew's Oxford.

Empty bus seats are lit in dark neon colours.

Vy Tran on Unsplash.

It is 1979. I am aged 23 and have been in great mental and emotional anguish and pain for years. I am on a pointless journey, on Greyhound busses, from the East coast of America to the West, and am presently sitting in a parked bus just outside a city in Arizona; the powerful engine idles as we wait for departure time, giving a gentle to-and-fro rocking motion to the bus. I have not eaten for days, am unspeakably tired of my life, and have made a written list of possible ways to end it.

But not on that list is one possibility I have not previously considered, but which is now before me. As I look out to my right, up into the Arizona desert hills, I realise that here is an option which perfectly fits with my desire, not so much to do away violently with myself, as simply to drift into a passive oblivion; I realise that I could simply rise from my seat right now, get off the bus, stumble off into the desert hills, lie down, and wait to die. I need not shoot or poison myself after all. I know I can do this, and fairly easily; to die will take time, but no matter. No-one knows where I am, no-one will know I am missing, no-one will come looking for me, and probably no-one will find me. It is suddenly an immensely attractive prospect, and I am seconds away from rising up from my seat...

There is one thing, one thing only, that makes me hesitate; it is what other people would call ‘a religious belief’, but to me it is simply a truth.

It is this; I am absolutely sure that there is a God. And suddenly there is something grimly, darkly humorous even, in what I thus believe will follow my death; I will find myself, not in peaceful oblivion, but in the presence of God. I will, as they say, ‘meet my Maker’. And what then will I say to God? I will say: “Apologies: I could not go on, there was no other way out for me”. But what, I reason, if God were then to say: “You are wrong. There was a way forward. Look: you could have stayed on the bus, and had you done so, let me show you how your earthly future would have panned out…” And I will listen, and I will watch, as the film rolls on, showing me an alternative future. But of course, by then it would be too late…

And suddenly, sitting on that bus, in a moment of cold clarity, I realise, with a kind of desolate logic, how I am caught. In a very real sense, my belief in God my Creator means that I am not in fact ‘free’ to dispose of myself; more, that what I refer to so glibly as ‘myself’ is not in fact MY self. The bus ticket in my pocket may be ‘my’ ticket, my rucksack ‘my’ rucksack, but my life is not after all my possession, mine to dispose of; it is a loan, a gift, from a Giver, to Whom I am responsible, answerable…

I remain in my seat. The bus continues its gentle rocking motion a while longer. The driver gives his familiar 1970s Greyhound driver’s recitation, the various admonitions and prohibitions I have heard so many times as I have crossed America, I could give the speech myself (ending with the words ‘and no marijuana’, which always raises a smile) – and the bus pulls out onto the freeway. I look back over my shoulder at the desert hills as they recede, and feel I am leaving more than the desert hills behind; I am still in deep pain, but know I have left a possibility behind me, for good. Months later I will reflect on this moment and realise with a smile that the name of the city where I had put death behind me by not rising was Phoenix.

And so my journey has continued – on, in due time, to a return to England, to a measure of healing, to getting ordained as an Anglican priest, to thirty-four years of Church ministry, to marriage to a very remarkable woman, to fatherhood of two children - and, at some future moment, to my own death: all in God’s time.

How shoddy, shrunken and lonely, is our much vaunted and trumpeted vision of the autonomous individual.

The word ‘God’ was probably used very little, if at all, in the MPs debate on assisted suicide - and this debate has really been about assisted suicide, not ‘assisted dying’, given that people will be given drugs to self-administer. Even the Christian MPs who spoke, did not mention God, as they knew what could be said, and what could not, in order for them to be heard at all. The public arguments for, and against, the legalisation of assisted suicide have almost without exception had to be premised on one agreed assumption, apparently the only one now permissible in a post-Christian, liberal humanist, agnostic/atheist society: the assumption that my life is mine. The arguments used for assisted suicide resolve down to: “It is my life: I should be allowed to decide when to end it”. Most of the arguments used against resolve down to: “Yes, of course, granted, agreed, it is your life: but there may be unintended consequences for others in allowing you to end it, others may feel obliged to end their lives”, etc. At no point could anyone say, as I so passionately would claim: “No, it is not your life to dispose of”; there is now, it seems, no public place for the apostle Paul’s blunt statement in his letter to the Church in Corinth: ‘You are not your own.’

Yet this is now one of the most fundamental beliefs of ‘my’ life: and I have found it to be totally liberating and beautiful. I think of those glorious sculptures on the outer walls of Chartres Cathedral, including the representation of the creation of Adam, presented as emerging from the very mind of God. I think of the glory of man and woman made in God’s image as stewards of creation. I think of the extraordinary wonder of the Incarnation, of God embodied in Christ. I think of the sufferings of Christ on the cross; and I think, yes, of course I think, of the sufferings of my fellow men and women and children, and of my own sufferings, and of the call to me to shoulder the burden, both of living, and of dying, in God’s time.

And, alas, I think I also see something of how shrivelled, how wizened in comparison, how shoddy, shrunken and lonely, is our much vaunted and trumpeted vision of the autonomous individual – “my life, my rights, my body, my choice” - in the dominant contemporary Western mindset, eating away steadily like a corrosive acid any wider conception of community and the social institutions that enshrine it, and any sense of a deeper accountability to God.

Where will the current assisted suicide decision ultimately lead? What is the destination? It is difficult to predict, but the signs from other countries who have gone down this road are not good.

But what do I know? Do I have answers to all the questions around assisted suicide? I confess I do not. But one thing has become clearer to me: I am on a very different journey from the one my nation is travelling now.