[Answered]: Case description:Mr Black is a 63-year-old person…

Case description:Mr Black is a 63-year-old person who has been suffering from hypertension and diabetes over the last 20 years. He is currently receiving treatments for both conditions (Minidiab and Tritace) but admits rather erratic compliance. He self-monitors his BP and BGL from time to time but not regularly. Today he presents in the office with shortness of breath which has been worsening over the past five weeks. He has, however, experienced episodes of shortness of breath during the past year, especially when exerting himself. He fatigues easily and has lost all his energy to do anything. He is especially worried that even short walking now leads to marked weakness and shortness of breath forcing him to take a rest before continuing. On several occasions he awoke suddenly from sleep because he couldnt catch his breath and developed a dry cough but with no audible wheezing. The breathing problem improved when he sat on the edge of his bed for 30 minutes. He now sleeps on two pillows, which seems to help him breathe better. Few days ago he experienced unusual weakness and numbness in his left arm and leg with dizziness, which went away in half an hour so he did not seek medical attention. During that time he was unable to get up from his armchair and had difficulties clearly articulating words. This never happened before. Often he has a feeling of heart racing and jumping, especially during physical activity. However, he has not experienced any chest pain or chest heaviness so far. He is also complaining about numbness, tingling and burning affecting his feet, interfering with his mobility and sleep. He smokes around 15 cigarettes daily and drinks a beer or two a day. He retired 2 years ago from his work as a truck driver.Vital signs:Temperature: 37oCBlood pressure: 150/95 mmHgPulse rate: 100 beats per minute, irregularRespirations: 20 breaths per minutePulse oximetry 92%Physical examination:Weight: 79kgHeight: 168cmHis skin colour is pale and his lips/tongue are faintly bluish. Pulse on peripheral leg arteries is weak. There is moderate swelling around the ankles that pits on pressure. Coarse inspiratory crackles could be heard during chest auscultation over the lung bases. Heart activity is irregular and fast, S3 is heard at the apex.Routine blood tests:Hb 135 g/LRCC 4.5 x 1012/LHct 43%WCC 8 x 109/LPlatelets 180 x 109/LESR 12 mm/hUrea 11 mmol/LCreatinine 0.3 mmol/LBGL (fasting) 8 mmol/LUrinalysis (dipstick):Blood negProteins ++Glucose +Your task:Explain the likely pathophysiology of presenting featuresInterpret the vital signs and findings on physical examinationInterpret the significance of the blood testsDevelop the list of possible conditions the patient might have (differential diagnosis)Suggest and give rationale for further diagnostic tests I need help with this assesssment