تم إدراج كامل الملاحظات حتى ما وُصل إليه في آخر محاضرة في كل المواد✅.

PT342||المحاضرة الرابعة

14_9_2026🗓️..
ملاحظات المحاضرة🫀 :


🔴"The main function of the heart is to act as a pump. It consists of four chambers and four valves."

🔴"The valves are anchored in place by chordae tendineae, papillary muscles, and the fibrous rings (roots)."


🔴"The endocardium is lined by simple squamous epithelium with an underlying layer of connective tissue. It provides a smooth surface that prevents blood turbulence and thrombosis. Additionally, it secretes anticoagulant substances such as nitric oxide, tissue factor pathway inhibitor (TFPI), and heparan sulfate to inhibit blood clotting. Consequently, any endothelial damage to the endocardium triggers thrombosis."


🔴Ischemic Heart Disease (IHD) is also referred to as Coronary Artery Disease (CAD), primarily because CAD is the most common cause of cardiac ischemia."

🔴"Vasculitis can occur in a small branch of a coronary artery and cause Ischemic Heart Disease (IHD)."


🔴"The subendocardial zone is the most vulnerable to ischemia and the first layer to undergo necrosis because it is the furthest from the epicardial blood supply.".

MB342🧫||المحاضرة الرابعة :

_ملاحظات المحاضرة :


🔴all members of the Enterobacteriaceae family share the Core polysaccharide (or core oligosaccharide) as a common structural component of their Lipopolysaccharide (LPS).❗MCQ❗.




🔴Escherichia coli (E. coli) is the most common cause of community-acquired urinary tract infections (UTIs)."



🔴Widal Test
• It measures agglutinating antibody levels against O & H Ags.
• Perform for serodiagnosis of Salmonella enteric fever.
•A fourfold rise in the antibody titer between paired sera (convalescent
and acute sera) is diagnostic.❗important❗.

تم تنزيل كامل ملاحظات محاضرات هذا الأسبوع✅.

المحاضرة الخامسة ||PT342
19_9_2026🗓️
ملاحظات المحاضرة:

🔴Irreversible injury of ischemic myocytes first occurs in the subendocardial zone.❗



🔴2-24 ➡️Coagulative Necrosis.❗❗
🔴 1-3days➡️Dense neutrophilic .❗❗
🔴3-10days➡️macrophages.❗❗


🔴When a patient presents with severe chest pain accompanied by nausea, a Myocardial Infarction (MI) must always be considered as a top differential diagnosis🫀.
An MI does not always present with the classic radiation to the left arm. It frequently manifests with atypical symptoms, such as nausea, vomiting, or discomfort that mimics epigastric pain.
Mistaking cardiac pain for a primary gastrointestinal issue is a critical error. Clinicians should always rule out a life-threatening MI first—typically with an ECG and cardiac enzymes—before assuming the cause is strictly epigastric.


🔴creatine kinase MB [CK-MB] isoenzyme (elevated 2-4 hrs and
lasts 72 hrs) .


🔴 TROPONIN I is cardiac specific protein (elevated 4-6 hrs, and
lasts 7-10 days.

المحاضرة السادسة ||PT342
21_9_2026🗓️
ملاحظات المحاضرة:



🔴 Acute rheumatic endocarditis ➡️Rheumatic vegetation:The vegetations are small (pins head), pale, sterile thrombosis firmly attached.❗


🔴Diagnosis: There is no specific test for acute rheumatic fever. The diagnosis is made based on clinical findings when either:two major or one major with two minor of Jones criteria.❗❗


🔴Major Criteria❗❗:

_Joint involvement (arthritis).
_O Looks like heart (pancarditis).
_ Nodules (subcutaneous).
_Erythema Marginatum.
_Sydenham's chorea.



🔴Mainor Criteria❗❗:

_Arthralgia .
_previous rheumatic fever .
_Fever .
_Increased C-reactive protein.
_ESR/ leukocytosis.
_ECG changes.


🔴Valvular damage in chronic Rheumatic fever:
The valve cusps and the corda have diffused fibrous thickening, opaque, stiff, and white, with calcifications leads to abnormalities that can result in valve stenosis or regurgitation Fibrosis commissural fusion cause “fishmouth” or “buttonhole➡️valve stenosis.
Fibrosis of cusps and chorda tendinae with retraction ➡️valve
regurgitation.

MB342🧫||المحاضرة الخامسة :

_ملاحظات المحاضرة :
🔴Salmonella can be associated with:
Primary bacteremia
Secondary bacteremia
Secondary septicemia.


🔴Shigella➡️Self-limited (must give antibiotic to reduce risk of secondary spread to family members & other contacts.❗MCQ❗..


🔴Proteus➡️Mainly cause UTI (cystitis, pyelonephritis).
🔴Bacteroides➡️Normal flora of the human URT, GIT, & genitourinary tract.



🔴In Neisseria species (N. meningitidis and N. gonorrhoeae), the outer membrane lipopolysaccharide structure—often termed Lipooligosaccharide (LOS) due to the lack of long O-antigen side chains—acts as a major virulence factor.
In contrast, the Lipopolysaccharide (LPS) of Bacteroides species (such as Bacteroides fragilis) has low endotoxic activity and is not considered a major primary virulence factor.❗important❗.



🔴In Neisseria species, the endotoxin—specifically Lipooligosaccharide (LOS)—is a key virulence factor directly responsible for most of the clinical symptoms and pathophysiology observed during infection.❗MCQ❗..


🔴Bacillus anthracis➡️Polypeptide capsule.

🔴Bacillus cereus➡️Panophthalmitis.

المحاضرة السادسة ||MB342
22_9_2026🗓️
ملاحظات المحاضرة:



مهم ويجي ف الoral👩🏻‍🔬⬇️:


🔴5 Pathogenic Pyogenic Cocci, including their primary virulence factors ?:
1-Staphylococcus aureus➡️Key Virulence Factors: Coagulase.
2-Streptococcus pyogenes (Group A Streptococcus)➡️Key Virulence Factors: M protein.
3-Streptococcus pneumoniae➡️Key Virulence Factors: Polysaccharide capsule.
4-Neisseria meningitidis➡️Key Virulence Factors: Polysaccharide capsule.
5-Neisseria gonorrhoeae➡️Key Virulence Factors: Pili .


🔴Nagler’s reaction➡️important.❗❗.

المحاضرة الرابعة ||PH342
21_9_2026🗓️
ملاحظات المحاضرة:

🔴According to their source:

Natural ➡️:phenanthrene group __Benzylisoquinoline group.❗MCQ❗.


🔴phenanthrene group➡️morphine,codeine, thebiane. They are
spasmogenic, potent CNS action, analgesics.❗MCQ❗.


🔴Benzylisoquinoline group➡️papaverin, noscapine and narcotine.
They are spamolytics, negligible CNS action, non analgesics.❗MCQ❗.


🔴Mu (\mu) and Kappa (\kappa) Opioid Receptors:
-Kappa (\kappa) receptors act primarily at the spinal level.
-Mu (\mu) receptors act primarily at the supraspinal level.
However, both receptors exhibit a mixed action, working together simultaneously across both levels to mediate analgesia.


🔴Pharmacological action of Morphine➡️On eye: The miosis and pinpoint pupil (PPP) is a characteristic of morphine over dose.❗❗



🔴Therapeutic uses of Morphine:
Dose:
a. Ordinary tablet: 30 mg daily
b. Modified release tablet: 15mg twise daily.
c. 10 mg S.C, 5 mg I.V to prevent hypotension.
d. Break through pain: 1/6 of total daily dose❗MCQ❗..

لو الpaint ياخد ف 30 mg وخش فBreakthrough pain ف ح نعطيه 1/6 ونقسم30 ع 6
يطلع 5 ف نعطيه 5.⬅️ مهمة تجي ك مسألة بالطريقة هذه👩🏻‍🔬❗❗..




🔴Addiction (Dependence): Drug addiction occurs more frequently with short-acting drugs because they produce rapid spikes in blood concentration, leading to intense euphoric highs and severe withdrawal symptoms.
Treatment Strategy: In addiction treatment, short-acting opioids (such as morphine) are discontinued and replaced with a long-acting drug, such as methadone.


🔴Meperidine (Pethidine)➡️Opioid with antimuscarinic effect.❗MCQ❗.

🔴Fentanyl (Sublimaze)➡️It is usually used as skin patches , epidural
injection.❗MCQ❗.


🔴Fentanyl (Sublimaze)➡️only safe opioid in renal failure patient..❗MCQ❗.

🔴Buprenorphine _methadone➡️treatment of opioid addicts.❗MCQ❗.

🔴of acute opioid toxicity=overdose.

السلام عليكم ورحمة الله وبركاته ..

تم بحمد الله تنزيل كامل ملاحظات محاضرات هذا الأسبوع.
إن استفدتم ولو بشيء بسيط من هذا العمل، فلا تحرموا أبي من دعوة صادقة بظهر الغيب؛ فهو يمر بوعكة صحية بعد إجراء عملية جراحية،وبحاجة إلى دعواتكم🙏🏻.

المحاضرة السابعة ||MB342
26_9_2026🗓️
ملاحظات المحاضرة:

🔴Yersinia➡️Bipolar staining (Safety pin)📎❗..

🔴Yersinia➡️Fermenter (oxidase negative), Catalase poitive❗❗

🔴Microaerophilic➡️live in low concentration of Oxygen and high concentration of co2.
🔴Y. enterocolitica more common than Y. pseudotuberculosis.

🔴Yersinia➡️suppression of immune responce.❗MCQ❗..

🔴Yersinia has the ability to survive and replicate extracellularly after emerging from macrophages.

🔴Humans are accidental hosts for Yersinia pestis. Plague is not transmitted from human to human, except in the case of pneumonic plague. Other forms of plague are not transmitted between humans.❗MCQ❗..
نبهت عليها الدكتورة لازم تقولك pulmonary لو تكلمت بصفة عامة ما ينتقلش من human to human لازم تحدد النوع وتقول pulmonary👩🏻‍🔬🫁❗.


🔴Peptic ulcer refers to ulcers occurring in both the stomach and the duodenum.

🔴Post-treatment confirmation of eradication is recommended for all
treated patients.


🔴Helicobacter➡️Post-treatment confirmation of eradication is recommended for all treated patients. However, serology testing should never be used to confirm eradication. If an endoscopy is performed, endoscopic testing can be used.


🔴Campylobacter fetus (systemic infections)Have capsule-like protein (S protein) resistant to serum killing.❗❗.

Mb342 🔬⚠️..


تم الانتهاء من تدوين جميع ملاحظات الدكتورة ومواضع الـ MCQ لجزئية الامتحان النصفي.

المحاضرة السابعة||PT342
26_9_2026🗓️
ملاحظات المحاضرة:

🔴Valvular damage in chronic Rheumatic➡️Fibrosis commissural fusion cause “fishmouth” or “buttonhole” ➡️valve stenosis.

🔴Restrictive cardiomyopathy➡️Restrictive Cardiomyopathy: decrease in ventricular compliance, resulting in restrict ventricular filling during diastole.

🔴Dilated Cardiomyopathy➡️Most common type of cardiomyopathy.

🔴Infective Endocarditis: The most common cause is bacteria (most commonly Staphylococcus aureus or Viridans streptococci).❗

🔴Myocarditis: The most common cause is a virus (such as Coxsackievirus B).❗