Mitochondrial ultrastructure in cardiac myocytes is associated with the cardiovascular death in patients with heart failure

Table 1 Clinical and anamnestic characteristics of patients included in the study, n (%)

Parameter		Value
Age, years		66 (57; 71)
Male gender		35 (87.5)
Female gender		5 (12.5)
Arterial hypertension		39 (97.5)
A history of stroke		2 (5)
History of myocardial infarction		34 (85)
AF		14 (35)
BMI, kg/m2		30 (26; 33)
NYHA class	I	2 (5)
	II	22 (55)
	III	15 (37.5)
	IV	1 (2.5)
Decompensation of HF in the last 12 months		11 (27.5)
LVEF, %		38 (30; 45.7)
NTproBNP, pg/mL		170 (73; 316)
The result of the 6MWT, m		355 (295; 400)
CCS angina class	I	6 (15)
	II	14 (35)
	III	20 (50)
	IV	0

AF: Atrial fibrillation; BMI: Body mass index; HF: Heart failure; NYHA: The New York Heart Association; LVEF: Left ventricular ejection fraction; NTproBNP: N-terminal fragment pro B - type natriuretic peptide; 6MWT: 6-minute walk test; CCS: Canadian Cardiovascular Society.