BDNF and congestive heart failure: Increased mechano‐sensitive afferent sensitization in CHF may be driven by muscle cyclooxygenase (COX) signalling, dorsal root ganglia (DRG) purinergic/glutamatergic/brain‐derived neurotrophic factor (BDNF) signalling pathways and/or downregulated voltage‐gated potassium (Kv) channels in lumbar DRGs (Antunes‐Correa et al., 2014; Hong et al., 2021; Koba et al., 2009; Middlekauff et al., 2004; Middlekauff et al., 2008; Schiller et al., 2019; Tikhonov & Zhorov, 2005; Wang et al., 2010).