Day: April 30, 2024

ECG of Atrial and ventricular hypertrophy

https://youtu.be/wGz1jQD9YLU ECG of atrial and ventricular hypertrophy ECG training course Date of show : 08 May 2024, 09:00 PM CAI Introduction to ECG – 1st part 20:19 Heart axis deviation and alfa angle 23:13 Normal ECG values and heart rate calculation 37:53 ECG of atrial and ventricular hypertrophy 31:37 ECG changes in Myocardial Infarction MI 18:56 ECG of heart rate disorders 17:21 Arrhythmia, Flutters and Fibrillations 22:50 Extrasystole arrhythmias 14:49 ECG of heart block 27:19

Gut Infections

Short incubation periods   Staphylococcus Aureus A Gram-positive bacterium which produces toxins causing intestinal inflammation. The bacteria makes enterotoxins to compete with other bacteria in cooked and processed foods, but these end up being ingested by humans, causing symptoms The symptoms are due to the toxin rather than the bacteria, which gives the short incubation period of 1–6 hours.   Symptoms Nausea and explosive vomiting up to 24 hours Abdominal pain, weakness and headache   Key tests Stool culture to assess if bacterium is present Management Fluid and electrolyte replacement as illness quickly resolves within a couple days   Bacillus

Sexually Transmitted Diseases (STDs)

Chlamydia This is a condition which is caused by the bacteria Chlamydia trachomatis. It is the commonest sexually transmitted disease in the UK. It is spread through all types of sex and can be passed to the baby during childbir   Symptoms  Often the infection is asymptomatic In females, can cause vaginal bleeding, discharge and deep dyspareunia In males, can cause urethritis (dysuria and discharge) Eye disease – can cause blindness Joints – often a cause of reactive arthritis Risk factor for pelvic inflammatory disease (PID) in women, leading to infertility   Key tests Investigation of choice is nuclear acid

Parasitic Infections

Malaria This is a mosquito borne infection which injects the parasite Plasmodium into the blood. There are 4 main variants of the parasite and the natural vector is the female anopheles’ mosquito Pre-erythrocytic stage Mosquito injects sporozoites into human blood These migrate to liver and infect hepatocytes, multiplying by mitosis They can stage in the liver for up to 2 years remaining immature as hypnozoites These differentiate into merozoites which are released from the liver into the bloodstream   Erythrocytic stage Trophozoites infect RBCs, feeding on haemoglobin using the enzyme haem polymerase These form a schizont and multiply asexually, and

Fungal Infections

Pneumocystis Jirovecci This is a fungal infection that is seen in immunocompromised patients. It is an AIDS-defining disease, typically causing a pneumonia in HIV positive patients.   Symptoms Atypical pneumonia (SOB, dry cough, fever) but very few chest signs The classic symptom is desaturation of SpO2 during exercise/exertion Can lead to secondary pneumothorax, hepatosplenomegaly and lymphadenopathy   Key tests Blood tests show raised inflammatory markers and fungal markers (beta-glucan) CXR/HRCT shows bilateral interstitial pulmonary opacifications Sputum culture – this can be taken directly or from bronchoalveolar lavage if needed Lung biopsy may be required if diagnostic doubt   Management Co-trimoxazole is

Viral Infections

AIDS This is a condition caused by the human immunodeficiency virus (HIV). The virus gains entry in CD4+ T cells. As the infection progresses, it leads to depletion of the CD4 cells, leading to a decrease in immune function. This leads to acquired immunodeficiency syndrome (AIDS).   Transmission Sexual Transmission Vertical (mother to baby) IVDU   Symptoms Seroconversion (3–12 weeks following infection) Flu-like symptoms with fatigue, fever, lymphadenopathy, sore throat, and arthralgia Erythematous papular rash and mouth ulcers Persistent generalised lymphadenopathy (swollen lymph nodes lasting > 3 months)   Chronic infection This is usually asymptomatic until complications of immunosuppression develop

Resistant Bacterial Infections

C. difficile This is a Gram-positive bacterium which colonises the gut in the absence of one’s commensal harmless bacteria. The commensal flora in the gut can be killed due to the use of broad-spectrum antibiotics, leaving the individual vulnerable to a C. diff infection. The bacteria make a toxin which leads to inflammation in the colon, causing pseudomembranous colitis. It is a common hospital-acquired infection and can spread rapidly between patients.   Causes Most commonly secondary to antibiotics beginning with the letter “C” like cephalosporins, clindamycin. Also associated with PPI use.   Symptoms Diarrhoea, abdominal pain, fever If severe, can

Bacterial Infections

Lyme disease This is a condition which is caused by the bacteria Borrelia burgdorferi. Transmission occurs via the Ixodes tick bite, so it is important to ask a detailed travel history to places where these ticks live e.g., forests, parks (e.g., Richmond Park in London has a higher incidence). It initially causes an expanding area of redness on the skin at the site of the tick bite. The bacteria can become systemic and spread to the heart, joints and CNS where they can persist for years. It is thought that the bacteria induce an autoimmune disease secondary to molecular mimicry,

Psychiatric History

The psychiatric history is probably one of the most difficult histories to conduct, as the patient may present with no physical symptoms at all, just a general sense of feeling low. As a result, they may not give you much information at all and not be willing to engage with your questions. ‌ The biggest mistake that students make when taking a psychiatric history for depression is losing their structure. It is important to remember that we still want to find out about the presenting complaint – feelings of lethargy, poor sleep, loss of appetite are all symptoms and we

Paediatric History

This is a history taking template for a young child where you will be taking the history from the parent.  Now that you are familiar with taking basic histories, there are some situations where we have to amend our general structure. Keep in mind, whether it be children, mental health patients or other specific conditions, we are still very much interested in finding out the presenting complaint, ICE and the past medical, family, drug and social history. The only difference in these histories is that we must also ask some additional questions to screen for problems specific to this group

Vomiting

The vomiting history is similar to cough – it is a symptom which has an onset, timing etc. but also we need details about the physical content of the vomit. So what are some differentials for vomiting? Neurological Tumour Raised ICP Idiopathic intracranial hypertension Hydrocephalus Bleed   Infection Gastroenteritis Infective colitis Malignancy Gastric cancer GI cancer   GI Pancreatitis Bowel obstruction Oesophageal varices Peptic ulcers Alcohol/gastritis It is very important to screen the abdominal system right from top to bottom. Notice how vomiting with constipation is more likely to suggest bowel obstruction, compared to with diarrhoea (more likely food poisoning). Unexplained vomiting

Urinary Frequency

This history will usually refer to a middle-aged/elderly male complaining or urinary symptoms. The main purpose of the history will be to distinguish whether this condition is benign (BHP) or something more sinister, such as prostate/bladder cancer. In addition, for a younger patient, we might also be concerned with a STI. So what are some common conditions which might cause urinary frequency? Urinary tract Benign prostatic hyperplasia Prostate cancer Bladder cancer Over-active bladder Infection UTI STI Looking at these differentials, the systems we have to explore are the urinary system and possible sexually transmitted infections. Again when going through the symptoms, we should enquire

Syncope

This history refers to patients who have experienced a loss of consciousness on more than one occasion. What are some common conditions which might cause this? Raised intracranial pressure Bleed Tumour Hydrocephalus   Neurological Epilepsy Cardiovascular Palpitations (AF) Vasovagal reflex Postural hypotension Looking at these differentials, the systems we are most interested in exploring during our specific systems review will be the neurological and cardiovascular systems. Remember, common things are common. Someone presenting with syncope is much more likely to have some form of vasovagal reflex, or a side effect of their blood pressure medication than epilepsy – but this is a diagnosis we do not

Rectal Bleeding

Rectal bleeding is a serious symptom which should ring bells. If we take the anatomical approach the main conditions which can cause this are bowel cancer, diverticulitis, IBD but also more benign conditions like haemorrhoids and an anal fissure. Therefore, in our GI specific systems review, we will need to work through the GI tract. Again, in any female of child bearing age (14 to 60) we should always query pregnancy and gynaecological conditions.   Introduction Good afternoon, my name is _______ and I am one of the student doctors here. Is it _______(patient’s name)? I just wanted to ask

Palpitations

As a medical student, this is actually one of the simplest histories to take. The reason is that apart from the heart, there are few things which can cause palpitations. Nevertheless, what we do have to concentrate on is taking a really detailed account of the presenting complaint – specifically when do the palpitations start, what brings them on, are they there all the time etc. In addition, we have to screen for cardiovascular and breathing symptoms, as these are connected to the heart. So what specific systems should we screen for?‌ Cardiovascular–> Chest pain, loss of consciousness Respiratory –> Breathlessness

Joint Pain

Joint pain is one of the most common presentations you will see. Again we are interested in the onset, timing etc. A key aspect for joint pain is working out whether this is an inflammatory or non-inflammatory problem. The difference in prognosis, treatment of osteoarthritis vs rheumatoid is substantial. So an important symptom to explore is STIFFNESS. Is it worse in the morning? How long does it last? So what are the differentials for joint pain? Trauma Sports injury Fall   Non-inflammatory Osteoarthritis   Other Chronic fatigue syndrome Fibromyalgia Inflammatory Rheumatoid arthritis Rheumatoid variants Gout Pseud-gout Bursitis Septic arthritis Therefore,

Headache

When considering a headache, what are some common conditions which might cause this? Raised intracranial pressure Bleed Tumour Idiopathic intracranial hypertension Hydrocephalus   Infection Sinusitis Meningitis Encephalitis Brain abscess  Trauma Extradural/subdural hematoma   Neurological Epilepsy Migraine Tension headache   Infarction Ischaemic stroke Therefore, when conducting the specific systems review, we will need to ask questions that cover all of these differentials and allows us to narrow down (if not rule out) the most serious causes. This will most cover the head and neck and the nervous system   Introduction Good afternoon, my name is _______ and I am one of the student

Cough

Taking a history for a cough, vomiting, diarrhoea, and blood in the urine all fall into a group. Here you have a type of symptom which requires exploration not only about the onset, timeline, associated symptoms, but also about the physical content of the substance. A history which covers only one aspect will be inadequate and will mean that you miss out key information. Therefore, in these histories, do not forget to ask about the “S (specific questions)” in OATES. ‌ When considering a cough, what are some common conditions which might cause this? Chest infection Viral infection Pneumonia Fungus  

Chest Pain

Chest pain is one of the most common reasons why patients present into A&E. So what are some of the differentials to consider? Cardiovascular MI Aortic dissection Palpitations Aneurysm Heart failure Pericarditis GI Gastro-oesophageal reflux Respiratory Asthma Pulmonary embolism Chest infection   MSK Pulled muscle Costochondritis Therefore, when conducting the specific systems review, we will need to ask questions that cover all of these systems, which will allow us to narrow down (if not rule out) the most serious causes. In addition, during the presenting complain, as you gain more experience, you will naturally learn to ask more specific questions,

Abdominal Pain

With these different histories, whilst the overall structure will be identical to before, pay close attention to the presenting complaint and systems review sections – as this is what will differ.‌ For the presenting complaint, I have included the most common symptoms a patient is initially likely to tell you. Remember to screen fully, and only after you have fully screened for all the symptoms, you can follow SOCRATES or OATES to explore each one in detail. If there are symptoms listed in the example presenting complaints that the patient does not say, remember to ask about these in the

FAQs

It is important to note that the example history before is just a model, and so it might not work in 100% of situations. However, it is a template which should always give you a base with which to work from and not panic in stressful situations. Below are some common queries which students have and how to get round them.   1. What if the patient mentions their family history or something different during a different part of the history? Whilst you might have this model template in your mind, the patient will not. They are just going to

History Taking – Explained

Now that you have read a general template, let’s go through each aspect trying to understand exactly why we ask these specific questions, and what information we hope to gain from them.   Introduction Good afternoon, my name is _______ and I am one of the student doctors here. Is it _______(patient’s name) To begin within, it is essential that you introduce yourself to the patient and clearly explain what level you are i.e. whether you are a medical student, junior doctor, consultant. By doing this, the patient will be able to probably gauge your level of experience and knowledge

History Taking – A General Template

Below is a general template for taking a history. In a nutshell, we should aim to introduce ourselves politely and start with an open question thus allowing the patient to describe in their own words what the problem is. After this we can work through the different categories obtaining information to gain a full perspective of the patient’s illness and obtaining the most likely differentials. Do not worry if you do not understand why we are asking all these questions, it will be explained in much more detail on the next page.   Introduction Good afternoon, my name is _______

History Taking Principles

History taking is one of the most important skills required by a doctor. Many clinicians argue that 70% of the diagnosis can be found in the history, with follow up investigations, imaging and special tests only really required to answer initial doubts.‌ Each question in your history should be asked with a purpose. Let us imagine that someone has presented with vomiting. What are some differentials in this scenario? Gastrointestinal Infective colitis Pancreatitis Biliary conditions Bowel Obstruction Achalasia   CardioRespiratory Myocardial infarction   Neurological Cerebrovascular accident Extra/sub dural haematoma Raised ICP Brain tumour   Non-organic Drugs Alcohol Allergies   By