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•Causes of glomerulonephritis with low complement:

-Post-streptococcal glomerulonephritis
-Lupus nephritis
-Infective endocarditis
-Cryoglobulinemia
-Mesangiocapillary glomerulonephritis (90% in type II and 70% in type I).

#Renal
In CKD:

-Osteomalacia is secondary to deficiency of 1, 25-dihydroxycholecalciferol as kidney is unable to convert 25 hydroxycholecalciferol to 1,25 dihydroxycholecalciferol, due to deficiency of 1 α-hydroxylase enzyme.

#Renal
Anemia becomes obvious in stage B CKD.

#Renal
In CKD Bone diseases (renal osteodystrophy):

-Osteomalacia (or ricket called renal ricket)
-Osteoporosis
-Osteosclerosis (in vertebral body, giving rise to Rugger Jersey spine)
-Osteitis fibrosa cystica.


#Renal
-End stage renal disease or failure (ESRD) is a stage when renal replacement therapy is compulsory either dialysis or renal transplantation, without which death is likely.

#Renal
Poor prognostic indicators in glomerular disease:

•Male sex
•Hypertension
•Persistent and severe proteinuria
•Elevated creatinine at time of presentation
•Rapid rate of decline in renal function •Tubulo-interstitial fibrosis observed on renal biopsy.

#Renal
What are the signs of severe AR?

1-Prolonged EDM
2-A2 absent
3-Presence of left ventricular 3rd heart sound
4-Presence of Austin Flint murmur
5-Signs of LVF
6-Signs of enlarging heart.


#Cardiology
•To diagnose AR, remember the formula of 3:

-3 pulse: Collapsing (water hammer), dancing carotid and capillary pulsation.

-3 BP: Rise of systolic, fall of diastolic and wide pulse pressure.

-3 murmur: Early diastolic murmur, Austin Flint murmur and ejection systolic murmur.

#Cardiology
What is collapsing pulse, causes?

-In collapsing pulse, there is rapid upstroke and descent of pulse, seen by raising the arm above the head.

-Causes are:
1-AR (the most common cause)
2-Hyperdynamic circulation due to any cause
3-PDA
4-Rupture of sinus of Valsalva
5-Large AV communication.


#Cardiology
•What are the causes of high volume pulse?

1-Aortic regurgitation
2-Hypertension
3-Hyperdynamic circulation due to any cause (severe anemia, thyrotoxicosis, AV fistula, fever, Beriberi, pregnancy, P. disease etc.)
4-PDA.

#Cardiology
•Why this is called Water hammer pulse?

-The name originated from a Victorian toy, consisted of a sealed tube, half filled with water and half being vacuum.

-Inversion of the tube causes the fluid to fall rapidly without air resistance and strike the end like hammer blow.

#Cardiology
•Are “high volume pulse” and “collapsing pulse” synonymous?

-Collapsing pulse is always high volume, but all high volume pulse are not collapsing..!

#Cardiology
Prognosis in AS:

-If aortic valve isn't replaced, the onset of angina, syncope and dyspnea has been shown to correlate with an average time to death of 5, 3 and 2 years.

-Dyspnea has the worst prognosis followed by syncope then angina.

#Cardiology
Remember:

-S3 never occurs in MS.

#Cardiology
What are the signs of Pulmonary HTN?

-Palpable P2
-Prominent ‘a’ wave in JVP
-Left parasternal heave (indicates RVH)
-Epigastric pulsation (indicates RVH)
-Loud P2 on auscultation
-Early diastolic murmur (Graham steel murmur due to PR).

#Cardiology
•What are the causes of mid diastolic murmur (MDM)?

-Mitral stenosis
-ASD (due to increased flow through tricuspid valve)
-Tricuspid stenosis
-Left atrial myxoma
-Austin-Flint murmur in aortic regurgitation
-Carey Coomb’s murmur (a soft MDM due to mitral valvulitis in ARF).

#Cardiology
What is Lutembacher’s syndrome?

-Combination of ASD with rheumatic MS (it occurs in 4% cases of ASD).

#Cardiology
Signs of severe MS are:

-Pulse: Low volume
-S1: soft
-Opening snap: nearer to the S2
-MDM: Prolonged
-Evidence of pulmonary HTN and pulmonary congestion.severe it may be <1 cm2 (tight ms).

#Cardiology
What is the significance of opening snap in MS?

-It indicates that the valve cusp is still mobile
-It is absent when the valve is calcified
-The gap between S2 and opening snap indicates the severity of MS. The diminishing gap indicates severe MS
-It is always due to organic MS.

#Cardiology
•What is the feature of non-pliable mitral valve?

-Muffled first heart sound and no opening snap.

#Cardiology
What are the causes of culture negative endocarditis?

-Prior antibiotic treatment (common cause).
-Fungal, yeast, anaerobic infection or Q fever (needs special culture).
Right sided endocarditis.
-Non-infective endocarditis: Libmann Sac (non-bacterial verrucous endocarditis in SLE, which is usually associated with antiphospholipid antibody syndrome), marantic endocarditis (non-bacterial thrombotic or verrucous endocarditis found in malignancy, such as bronchial carcinoma)

#Cardiology