3)Arrhythmias (A) Tachycardia tachycardia→02 consumption↑ short diastolic phase KK less ventricular filling g less coronary filling reduced CO/stroke reduce ed O2 supply to myocardium reduced contractile force aggravate heart failure
3) Arrhythmias (A) Tachycardia tachycardia →O2 consumption ↑ ↓ short diastolic phase ↙ ↘ less ventricular filling less coronary filling ↓ ↓ reduced CO/stroke reduced O2 supply to myocardium ↓ reduced contractile force ↙ aggravate heart failure
(B) Brachycardia Brachycardia leads to the reduction of CO/min GA CO/min=CO/stroke X heart rate(strokes /min) 4) Pregnancy 5)others
(B) Brachycardia Brachycardia leads to the reduction of CO/min. CO/min=CO/stroke × heart rate (strokes /min) 4) Pregnancy 5) others
3. Classification of heart failure (1) According to the course of disease ) Acute HF 2)Chronic HF (2)According to the severity TA 1) mild HF or complete compensation 2)middle hf or incomplete compensation 3)severe HF or decompensation
(1) According to the course of disease 1) Acute HF 2) Chronic HF 3. Classification of heart failure (2)According to the severity 1) mild HF or complete compensation 2) middle HF or incomplete compensation 3) severe HF or decompensation
AHA Classification Class Patient Symptoms lass I(Mild) No limitation of physical activity. Ordinary physical activity does not cause undue fatigue palpitation, or dyspnea( shortness of breath) ass II(Mild) Slight limitation of physical activity. Comfortable at rest, but ordinary physical activity results in fatigue, palpitation, or dyspnea Marked limitation of physical activity derate Comfortable at rest, but less than ordinary activity causes fatigue, palpitation, or dyspnea Class Iv Unable to carry out any physical activity without Severe) discomfort. Symptoms of cardiac insufficiency at rest. If any physical activity is undertaken, discomfort is increased
Class Patient Symptoms Class I (Mild) No limitation of physical activity. Ordinary physical activity does not cause undue fatigue, palpitation, or dyspnea (shortness of breath). Class II (Mild) Slight limitation of physical activity. Comfortable at rest, but ordinary physical activity results in fatigue, palpitation, or dyspnea. Class III (Moderate) Marked limitation of physical activity. Comfortable at rest, but less than ordinary activity causes fatigue, palpitation, or dyspnea. Class IV (Severe) Unable to carry out any physical activity without discomfort. Symptoms of cardiac insufficiency at rest. If any physical activity is undertaken, discomfort is increased. NYHA Classification
3)According to the cardiac output(CO) LOW-output HF 2)High-output HF The cardiac output will decrease from "high △ 6 output state”, but the absolute value is still greater than the normal value of healthy person
(3)According to the cardiac output (CO) 1) Low-output HF 2) High-output HF The cardiac output will decrease from “high output state” , but the absolute value is still greater than the normal value of healthy person