Welcome to the website of the Christchurch Heart Group, a private practice cardiology services provider that offers expert knowledge and specialised testing and evaluation. Please read on to learn more about us and our services, or if you have a detailed enquiry, please don't hesitate to contact us.
Common Cardiac Conditions
In recent times, advances in diagnostic and surgical techniques have made repair of most cardiac defects possible, and many people born with these defects are now reaching adulthood and are enjoying active and full lives.
Treatment is based on the severity of the problem. Mild heart defects may not require any treatment at all, while more serious cases can be treated with medication, invasive procedures, or surgery. Most cardiac procedures formerly necessitated open-heart surgery, but today, many of these repair procedures can be performed as day cases through the use of percutaneous intervention techniques.
The majority of adults that have congenital heart disease should receive regular monitoring from a heart specialist. These patients require individually specific treatment and lifestyle advice pertaining to potential problem areas such as exercise, employment, pregnancy and family planning, any non-cardiac surgical procedures, insurance issues, endocarditis prophylaxis, their long term outlook, and the best steps to take to prevent or ameliorate any potential problems in the future.
In association with these conditions is a low level of inflammation in the blood vessel wall lining, initially producing a build up of cells associated with the laying down of soft inflammatory tissue, followed by collagen (a substance found in scars), and finally calcium. This 'plaque' builds up slowly over time and gradually pushes into the vessel’s lining, narrowing the vessel and restricting blood flow to the organ. When the organ in question is the heart, the condition is called ischaemic heart disease.
Cholesterol can simultaneously build up in the lining of the blood vessels in association with ischaemic heart diesase. This happens when supply of cholesterol exceeds the capacity of the body’s natural disposal system and the cholesterol is taken up by scavenger cells in the endothelium. A pool of liquid cholesterol can develop in the lining of a vessel, and if a break occurs in the vessel’s lining, then this pooled cholesterol causes blood to clot on contact, which reduces blood flow down the artery. When the heart is involved, this will cause an acute coronary syndrome (otherwise known as unstable angina or a heart attack).
Atherosclerosis cannot be completely prevented, but the chances of developing it can be minimised through healthy lifestyle choices in diet and participating in regular exercise. If atherosclerosis is shown to have developed, then medication is essential.
Treatment for arrhythmias will follow testing to ascertain the exact nature of the condition the patient has and its causes. Tachycardia treatments consist mostly of medication to stop the abnormal rhythm or to slow it down when and if it occurs. Bradycardia conditions may necessitate fitting of a pacemaker depending on the nature of the condition.
Patients with chest pain symptoms that suggest a cardiac origin (or with an unknown diagnosis) should consult a cardiologist. The cardiologist will obtain a detailed history of the pain, examine the patient and perform an ECG taken. Often further tests such as an exercise treadmill test or an echocardiogram may be conducted to further assess the likelihood of the chest pain being cardiac in origin.
Heart Failure ('Congestive Heart Failure')
Testing to determine the underlying cause of heart failure can include chest X-rays, electrocardiograms (ECG), echocardiograms (cardiac ultrasound), and angiograms. Treatment is likely consist of several medications over time in a programme initiated and monitored by your GP and cardiologist. These include medication that will control the amount of fluid that builds up, medication to slow down and protect your heart, and medication to "thin" your blood. Dieticians are often consulted regarding this condition as your intakes of fluid and salt can contribute to symptoms. Treatment may also include participation in cardiac rehabilitation programmes (run by trained physiotherapists). Follow up duties for this common condition are often shared by your GP and cardiologist.
A high blood pressure reading is important because it is evidence that the heart is having to work harder in order to overcome existing blood pressure within the blood vessels. This can lead to increase the muscle bulk of the heart and lead to its enlargement and weakness. Changes in the blood vessels (which become thicker and narrowed) can also take place as hypertension increases the progression rate of atherosclerosis (hardening of the arteries).Hypertension is in fact one of the key risk factors for the development of this condition, and when combined with additional other risk factors such as smoking, high cholesterol levels, or diabetes, artery blockages can result - particularly in the coronary (heart) arteries.
Causes of high blood pressure can be difficult to determine, but many people who have high blood pressure have a family history of the condition, so a genetic cause is likely. Lifestyle factors that can lead to the development of hypertension can include being overweight, eating too much salt in your diet, being physically inactive, and drinking alcohol at levels at elevated levels (more than one or two standard drinks a day).A handful of other causes can be detected by specific testing.
The common condition of high blood pressure (it is estimated that as many as 1 in 5 New Zealanders has the condition) typically produces few symptoms of poor health, unless it is very high or has existed in the body for a long time. The most effective way to detect high blood pressure is thus to have routine checks of your blood pressure made by a doctor.
High blood pressure can be reduced by both lifestyle measures and through the use of medication. Maintaining a normal weight range is a very good place to start, and such measures as keeping physically active most days, opting for a varied low-fat diet with restricted amounts of salt, restricting your alcohol intake to one or two standard drinks per day and quitting smoking (which may not lower your blood pressure, but reduces the risk of hardening of your arteries, heart attacks and strokes) are all effective steps.
High blood pressure medication has been in use since the 1960s and has since become sophisticated and effective. Medications produce different reactions in individuals and trying to monitor the effects of any blood pressure medication you are prescribed and reporting these back to your doctor is a good idea. It can occasionally take several weeks for particular types of hypertension medication to take effect, so you should persist with treatment even if your initial results are negligible.
Ischaemic Heart Disease
Angina is discomfort that stems from a build up of noxious agents in the heart muscle when its blood supply is restricted. Angina is a clinical diagnosis, which means it is based on your doctor’s interpretation of the information you provide them with. Typical angina is not necessarily even a pain, but more a (sometimes intense) discomfort felt as a tightness or constricting feeling in the chest (often in the middle) This discomfort may spread to the back, the neck and/or the jaw, and typically the left shoulder or arm / wrist (and sometimes the right arm as well). Often there is accompanying sweating and/or breathlessness. It is brought on with exercise (unless unstable), and often after eating, and will settle with rest. Angina symptoms typically only last a few minutes, and symptoms of over 30 minutes in duration are likely to be a sign of unstable angina. Angina can also occur as a result of emotional upset, and when lying down in bed. A severe case may present symptoms at rest or at night (but these attacks usually only last 5-10 minutes).
Angina can occur suddenly as an acute coronary syndrome (unstable angina); as the result of a stable (fixed) obstruction when the heart needs to work harder with exercise or emotion, or at rest, provided the narrowed arteries are tight enough (chronic stable angina). It can also be brought on by medical conditions such as infection or anaemia (secondary angina); or when the width a blood vessel is variable due to altered muscle tone in its lining (coronary spasm). Blood vessels are more irritable overnight, and thus angina symptoms often present at night in the right conditions.
Palpitations are often nothing to worry about, but they can also be of moderate importance or signs of a very dangerous situation. Because of this potential for a serious problem to be associated with or result from heart palpitations, anyone that experiences them should consult their GP. Some patients will require further referral to a cardiologist for more detailed investigation and possible treatment of the underlying issue.
Investigations that are ordered may often include blood tests, an echocardiogram (heart scan), a 24 hour Holter monitor, and/or an exercise treadmill test. Some patients require more extensive investigations. Treatments can range from adjustment via various medicines and to ablative therapy - a therapeutic 'burn' on the inside of the heart to “break” an unwanted electrical circuit, or an implanted defibrillator device for those rare patients that are suffering from serious electrical problems.
Presyncope / Syncope
Both syncope and presyncope are most commonly caused by a sudden drop in blood pressure levels. Sometimes this is caused by an obviously traceable factor (for example having a blood test, or the sight of blood) but on other occasions it may seem like a random occurrence. Loss of consciousness is most typically preceded by common symptoms such as, light-headedness, a dimming of vision, nausea, and/or a feeling of warmth. The person experiencing the symptoms may also feel sweaty or clammy and appear very pale. A speedy recovery typically follows, but blood pressure may remain persistently low for the next 15-30 minutes, which can bring associated feelings of “grogginess” and can often lead to people describing a feeling of being “washed out” the next day.
Less commonly but more seriously, syncope and presyncope can result from heart rhythm abnormalities such as pauses in the heartbeat or a racing of the heart. These problems can themselves stem from defects in the heart’s electrical system, or be associated with diseases of the heart muscle or valves. A careful check of the patient’s history - followed by appropriate heart examinations and checking their electrocardiograph - will usually provide the correct diagnosis and therefore suggest a course of treatment.
Valvular Heart Disease
A diseased heart valve can thicken and fail to perform its function properly, which causes an obstruction to the normal flow of blood, or might fail to provide a proper seal and thus allow blood to leak back into a heart chamber in a reverse of the normal blood flow. These consequences can have effects on health that range from trivial to serious, depending on the severity of the lesion. It is often perfectly normal to detect a tiny valve leak when examining the heart with Doppler echocardiography. A significant valve abnormality or problem, however, is normally be accompanied by the presence of a heart murmur on clinical examination. Investigations will then be performed via ECG, chest X-ray, and occasionally other tests (including Doppler echocardiography) are recommended if the murmur is thought to be significant. In many children and in some adults, though, a heart murmur does not necessarily equate to the presence of a heart valve lesion. Such murmurs are sometimes referred to as ‘innocent murmurs’, and have no importance, but do require a careful assessment.
Faulty heart valves do not necessarily require specific treatment, and lesions may be simply be monitored for any changes over a certain time period. Drug treatment to reduce strain on the heart and its valves are sometimes required. If there is a chance that bacteria could cause infection of a damaged valve (bacterial endocarditis) (for example during dental treatment), antibiotics may be prescribed. A severely diseased valve, though, will typically necessitate to repair or replacement via surgery, especially if it has been causing adverse symptoms.